Is there a WORDPRESS BACKUP!?

I did something to my blog, the whole thing scrwed up. Is there an option in wordpress to go back in time and restore? ... 30 min will be fine.

if its just a page look for revisions below your text area. if its not visible look for "screen options" in the top right then check the box "revisions" then click screen options again to make it shrink back. then look at the bottom of your text area.

there it will have listed times of revision you can go back to