site and admin login BLANK

I upgraded to 2.8 last week. Everything was working fine on my blog until this morning. Now, when I go to the main page of my site or to the login for http://www.pete-bakes.com, the pages are completely blank. I did not change any settings.

Has anyone else run into this? So far I have tried:

-Removing all plugins
-Changing to default theme

Thanks!