Function help for redirect after login based on referring link

I have a function in my child theme’s functions.php file which redirects visitors to a certain page once they successfully log in. It’s working fine.

I’m trying to add an additional function which won’t interfere with the existing function that would redirect visitors to a alternative page if they’ve reached the login page from a different “referring” page.

Here’s my existing function that’s working for the first redirect:

function login_redirect( $redirect_to, $request, $user ){

    return home_url('/my-page');

}

add_filter( 'login_redirect', 'login_redirect', 10, 3 );

Is there something I could add or tweak so that it “pays attention” to how they got to the login page and then sends them somewhere else?

Hope this makes sense. :-/