Apple ID says my password is wrong

Until a few weeks ago I've shared an apple ID with my mom and recently created my own apple ID so that we wouldn't have to share pictures. Now whenever I try to update my apps it asks for my apple ID password and says that it's wrong when I know that it is right. I've tried using the password to the old apple ID , signing out and back into my new apple ID, resetting my phone, and changing my password. Nothing has worked. My phone is fully up to date and I can even install new apps, but I still can't update my apps. What am I supposed to do?