diff --git a/Listify/app/src/main/java/com/example/listify/AuthManager.java b/Listify/app/src/main/java/com/example/listify/AuthManager.java
index 4ece51a..399511c 100644
--- a/Listify/app/src/main/java/com/example/listify/AuthManager.java
+++ b/Listify/app/src/main/java/com/example/listify/AuthManager.java
@@ -68,6 +68,11 @@ public class AuthManager {
         return password;
     }
 
+    public void nullify() {
+        email = null;
+        password = null;
+    }
+
     public void setAuthSession(AuthSession toSet) {
         authSession = (AWSCognitoAuthSession) toSet;
         waiting = false;
diff --git a/Listify/app/src/main/java/com/example/listify/MainActivity.java b/Listify/app/src/main/java/com/example/listify/MainActivity.java
index fef669e..90473f1 100644
--- a/Listify/app/src/main/java/com/example/listify/MainActivity.java
+++ b/Listify/app/src/main/java/com/example/listify/MainActivity.java
@@ -36,6 +36,15 @@ public class MainActivity extends AppCompatActivity implements CreateListDialogF
     private AppBarConfiguration mAppBarConfiguration;
     public static AuthManager am = new AuthManager();
 
+    @Override
+    public void onBackPressed() {
+        String prev = getIntent().getStringExtra("prev");
+
+        if (prev == null) {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -48,7 +57,6 @@ public class MainActivity extends AppCompatActivity implements CreateListDialogF
                 public void run() {
                     Intent intent = new Intent(MainActivity.this, SplashActivity.class);
                     startActivity(intent);
-                    finish();
                 }
             }, 1);
         }
@@ -198,7 +206,6 @@ public class MainActivity extends AppCompatActivity implements CreateListDialogF
                     am.signOutUser();
                     Intent intent = new Intent(MainActivity.this, com.example.listify.ui.LoginPage.class);
                     startActivity(intent);
-                    finish();
                 }
                 catch (Exception e) {
                     Log.i("Authentication", e.toString());
diff --git a/Listify/app/src/main/java/com/example/listify/SplashActivity.java b/Listify/app/src/main/java/com/example/listify/SplashActivity.java
index a5d9c2a..545c443 100644
--- a/Listify/app/src/main/java/com/example/listify/SplashActivity.java
+++ b/Listify/app/src/main/java/com/example/listify/SplashActivity.java
@@ -10,6 +10,9 @@ import androidx.appcompat.app.AppCompatActivity;
 public class SplashActivity extends AppCompatActivity {
     public static boolean showSplash = true;
 
+    @Override
+    public void onBackPressed() {}
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -20,8 +23,8 @@ public class SplashActivity extends AppCompatActivity {
             public void run() {
                 showSplash = false;
                 Intent intent = new Intent(SplashActivity.this, MainActivity.class);
+                intent.putExtra("prev", "Splash");
                 startActivity(intent);
-                finish();
             }
         }, 3000);
     }
diff --git a/Listify/app/src/main/java/com/example/listify/ui/ForgotPasswordPage.java b/Listify/app/src/main/java/com/example/listify/ui/ForgotPasswordPage.java
index fe59b9c..fee31e1 100644
--- a/Listify/app/src/main/java/com/example/listify/ui/ForgotPasswordPage.java
+++ b/Listify/app/src/main/java/com/example/listify/ui/ForgotPasswordPage.java
@@ -23,16 +23,20 @@ public class ForgotPasswordPage extends AppCompatActivity {
     String newPassword;
     String confirmNewPassword;
 
+    @Override
+    public void onBackPressed() {
+        String prev = getIntent().getStringExtra("prev");
+
+        if (prev != null && (prev.equals("Sign up") || prev.equals("Log in"))) {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_forgotpswd);
 
-        if(am.getEmail() != null) {
-            Intent intent = new Intent(ForgotPasswordPage.this, MainActivity.class);
-            startActivity(intent);
-        }
-
         button1 = (Button) findViewById(R.id.button1);
         button1.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -55,6 +59,7 @@ public class ForgotPasswordPage extends AppCompatActivity {
                     am.changePassword(email);
                 }
                 catch (Exception e) {
+                    am.nullify();
                     Log.i("Authentication", e.toString());
                     TextView invalidCred = findViewById(R.id.textView6);
                     invalidCred.setText("Password criteria not met. Please try again.");
@@ -74,10 +79,11 @@ public class ForgotPasswordPage extends AppCompatActivity {
                         try {
                             am.confirmPasswordReset(newPassword, code);
                             Intent intent = new Intent(ForgotPasswordPage.this, LoginPage.class);
+                            intent.putExtra("prev", "Forgot password");
                             startActivity(intent);
-                            finish();
                         }
                         catch (Exception e) {
+                            am.nullify();
                             Log.i("Authentication", e.toString());
                         }
                     }
diff --git a/Listify/app/src/main/java/com/example/listify/ui/LoginPage.java b/Listify/app/src/main/java/com/example/listify/ui/LoginPage.java
index 3754b52..c1d18a7 100644
--- a/Listify/app/src/main/java/com/example/listify/ui/LoginPage.java
+++ b/Listify/app/src/main/java/com/example/listify/ui/LoginPage.java
@@ -20,21 +20,26 @@ public class LoginPage extends AppCompatActivity {
     private Button button2; //Forgot password button
     private Button button3; //Log in button
 
+    @Override
+    public void onBackPressed() {
+        String prev = getIntent().getStringExtra("prev");
+
+        if (prev != null && (prev.equals("Sign up") || prev.equals("Forgot password"))) {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
 
-        if(am.getEmail() != null) {
-            Intent intent = new Intent(LoginPage.this, MainActivity.class);
-            startActivity(intent);
-        }
-
         button1 = (Button) findViewById(R.id.button1);
         button1.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(LoginPage.this, SignupPage.class);
+                intent.putExtra("prev", "Log in");
                 startActivity(intent);
             }
         });
@@ -44,6 +49,7 @@ public class LoginPage extends AppCompatActivity {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(LoginPage.this, ForgotPasswordPage.class);
+                intent.putExtra("prev", "Log in");
                 startActivity(intent);
             }
         });
@@ -61,10 +67,11 @@ public class LoginPage extends AppCompatActivity {
                 try {
                     am.signIn(email, password);
                     Intent intent = new Intent(LoginPage.this, MainActivity.class);
+                    intent.putExtra("prev", "Login");
                     startActivity(intent);
-                    finish();
                 }
                 catch(Exception e) {
+                    am.nullify();
                     Log.i("Authentication", e.toString());
                     TextView invalidCred = findViewById(R.id.textView5);
                     invalidCred.setText("Incorrect email or password. Please try again.");
diff --git a/Listify/app/src/main/java/com/example/listify/ui/SignupPage.java b/Listify/app/src/main/java/com/example/listify/ui/SignupPage.java
index 6e1eaeb..a3c2966 100644
--- a/Listify/app/src/main/java/com/example/listify/ui/SignupPage.java
+++ b/Listify/app/src/main/java/com/example/listify/ui/SignupPage.java
@@ -32,21 +32,26 @@ public class SignupPage extends AppCompatActivity {
     String password;
     String confirmPassword;
 
+    @Override
+    public void onBackPressed() {
+        String prev = getIntent().getStringExtra("prev");
+
+        if (prev != null && (prev.equals("Log in") || prev.equals("Forgot password"))) {
+            super.onBackPressed();
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_signup);
 
-        if(am.getEmail() != null) {
-            Intent intent = new Intent(SignupPage.this, MainActivity.class);
-            startActivity(intent);
-        }
-
         button1 = (Button) findViewById(R.id.button1);
         button1.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(SignupPage.this, LoginPage.class);
+                intent.putExtra("prev", "Sign up");
                 startActivity(intent);
             }
         });
@@ -73,6 +78,7 @@ public class SignupPage extends AppCompatActivity {
                     am.startSignUp(email, password);
                 }
                 catch (Exception e) {
+                    am.nullify();
                     Log.i("Authentication", e.toString());
                     TextView invalidCred = findViewById(R.id.textView3);
                     invalidCred.setText("Invalid credentials. Please try again.");
@@ -93,10 +99,11 @@ public class SignupPage extends AppCompatActivity {
                             am.confirmSignUp(code);
                             am.signIn(email, password);
                             Intent intent = new Intent(SignupPage.this, MainActivity.class);
+                            intent.putExtra("prev", "Sign up");
                             startActivity(intent);
-                            finish();
                         }
                         catch (Exception e) {
+                            am.nullify();
                             Log.i("Authentication", e.toString());
                         }
                     }
diff --git a/Listify/app/src/main/java/com/example/listify/ui/home/HomeFragment.java b/Listify/app/src/main/java/com/example/listify/ui/home/HomeFragment.java
index 7375918..9fccc5b 100644
--- a/Listify/app/src/main/java/com/example/listify/ui/home/HomeFragment.java
+++ b/Listify/app/src/main/java/com/example/listify/ui/home/HomeFragment.java
@@ -78,7 +78,6 @@ public class HomeFragment extends Fragment {
                                 emailIntent.putExtra(Intent.EXTRA_TEXT, "Hello, this email is to confirm that you have deleted your Listify account.");
                                 try {
                                     startActivity(Intent.createChooser(emailIntent, "Send mail..."));
-                                    getActivity().finish();
                                     Log.i("Finished sending email...", "");
                                     System.out.println("A");
                                 } catch (Exception e) {
@@ -87,9 +86,9 @@ public class HomeFragment extends Fragment {
                                 }*/
 
                                 am.deleteUser(requestor);
+                                am.nullify();
                                 Intent intent = new Intent(getActivity(), com.example.listify.ui.LoginPage.class);
                                 startActivity(intent);
-                                getActivity().finish();
                             }
                             catch (Exception e) {
                                 Log.i("Authentication", e.toString());