Can't Change Email, Never Got Password or Account Verification

I signed up with my Facebook account. I login with my Facebook here. It's got me as User144370480, I'd like to change that, but I can't change ANYTHING, since I don't know where the email with my actual account password is. Nor can I reset the password, because I'm not sure my Facebook has an email associated with it. This is a problem, because as the end of my free trial, I may not have the $50 to continue on for the year.

Advice?