Blog sudently stopped working

Hi,

So… I was playing around with widgets, adding them in the sidebar, then deleted it. When everything was back to normal, I refreshed the blog, and every page has the “That ‘something’ you are looking for isn’t here!
We’re very sorry, but that page doesn’t exist or has been moved.
Please make sure you have the right URL.”
The sidebar is showing though – exept for the Blogentries.
I haven’t moved or deleted anything but two widgets, I added and then deleted in the sidebar.

In Dashboard, none of my posts are showing. There’s a gray number, but whenever I press it, they don’t show.

I have no idea what I did, please help?

-Mejf