format menu gone and no code/visual choice for writing posts

Hi,

I was halfway through editing a new post earlier today when the formatting options (bold, list etc) suddenly disappeared from above my ‘write a post’ box. Plus, there’s now no choice between ‘visual’ and ‘code’ views, and I can no longer either upload files from WP or from my own PC.

Obviously I can’t post so it’s a right pain! As far as I’m aware I didn’t do anything I shoudn’t have. Can anyone advise?

Many thanks

Kate