Can’t login/access my blog anymore!

When I try to login to post, it won’t let me anymore!

I haven’t changed anything recently (plugins, etc.).
It’s not an issue with cookies.
I couldn’t login to the help forum either (I had to register as another user.)
I tried changing my password (clicking “forgot password” and entering the new one emailed to me) – didn’t work.
I tried logging in from a different computer – didn’t work.
I WAS able to login under a different name/password (I have an account as a subscriber).
But I still can’t login as the owner, so I’m locked out of my own blog! What the heck could be causing this?

P.S. I think I’m on v. 2.5 or 2.6. Blog address is politicalrelief.com

Thanks.