Fragment not opening with if condition

I have an if statement in when i the position 3 is selected that checks a condition of if a particular key has been stored in tinyDB(a form of shared preferences) to open a particular fragment this condition is true(i checked this with the System.out.println(tiny.getString("userSignedIn"); but the fragment does not open. The condition on position 3 in the code. Than you very much

bottomNavigation.setOnTabSelectedListener(new AHBottomNavigation.OnTabSelectedListener() {
        @Override
        public boolean onTabSelected(int position, boolean wasSelected) {
            if (position == 0){
                Home home = new Home();
                android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                fragmentTransaction.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
                fragmentTransaction.replace(R.id.parentLayout, home);
                moreOptions.setImageResource(R.drawable.ic_more);
                moreOptions.setVisibility(View.VISIBLE);
                text_changer.setText(R.string.app_name);
                fragmentTransaction.commit();
            }else if (position ==1){
                Categories categories = new Categories();
                android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                fragmentTransaction.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
                fragmentTransaction.replace(R.id.parentLayout, categories);
                moreOptions.setVisibility(View.INVISIBLE);
                text_changer.setText(R.string.tab_2);
                fragmentTransaction.commit();

            }else if (position ==2){
                MyDownloads myDownloads = new MyDownloads();
                android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                fragmentTransaction.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
                fragmentTransaction.replace(R.id.parentLayout, myDownloads);
                moreOptions.setVisibility(View.INVISIBLE);
                text_changer.setText(R.string.tab_3);
                fragmentTransaction.commit();
            }else if (position == 3){
                System.out.println(tinyDB.getString("userSignedIn"));
                //Check if user has already signed in
                if (getUserSignedIn.equals("Sign in Successful")){
                    UserSignedInProfile userSignedInProfile = new UserSignedInProfile();
                    android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                    fragmentTransaction.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
                    fragmentTransaction.replace(R.id.parentLayout, userSignedInProfile);
                    moreOptions.setVisibility(View.INVISIBLE);
                    text_changer.setText(R.string.tab_4);
                    fragmentTransaction.commit();
                }else if (getUserSignedIn.equals("Email address or password not correct")){
                    Profile recentVideos = new Profile();
                    android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                    fragmentTransaction.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
                    fragmentTransaction.replace(R.id.parentLayout, recentVideos);
                    moreOptions.setVisibility(View.INVISIBLE);
                    text_changer.setText(R.string.tab_4);
                    fragmentTransaction.commit();
                }