I can’t type or edit in my blog

I made one quick post and all was fine, it published fine. I can’t post anymore though. I can’t even click in the box where I should be typing. When I click edit to try to edit my previous post the post comes up and it looks like I should be able to type but then it disappears and the box is empty. I called a friend and she can type in the box just fine and see the words from the previous post when she clicks edit (they don’t disappear like they do for me).

Any thoughts? I’m going crazy.

Michelle