Dead-i,
It was giving me a permission denied error. I went in and reset the password for the database user account (to the same value it should have already been) and now it is working. It's as if the password had been changed, but I know I didn't change it.
Now it's just phpmyadmin that isn't working. It says, "cPanel was unable to successfully log you in to phpMyAdmin. If you are having issues logging in to phpMyAdmin, please
submit a support ticket." Below, it has username and password fields for logging in manually, but I've tried my x10hosting username and password, and the username and password for the database user account, and neither of those work.
Thanks again for helping me out.
-Matt