Emergency! Please help!

I really fucked up my website. I was installing a new theme, and in the settings changed my homepage name (i added a home extension thinking that would link to my temp home page) NOW I CAN'T LOG IN TO THE ADMIN AREA TO FIX IT!!! I'm such a fucking idiot!!!!

If anyone can tell me how to fix this, here is the web address:

http://www.teachingyourselfspanish.com

Thanks in advance.