Cannot make any changes since changing to 3.9.1

Hello

Help

I just noticed that I had an issue with my site when trying to add a new page or post. I can click “add page” or “add post” rather than seeing PUBLISH i just get Submit to Review, but it disappears.

I look at other similar questions on the forum and following some suggestions such as changing the theme and deactivating the plugs BUT when when I choose activate theme ie another theme it looks like it’s going through the motions to change it but nothing happens I’m still on the same theme and the same thing with deactivating plug ins. Nothing changes they’re still active even though I’ve clicked deactivate.

I’m not technie so when I see mentions of SQL script and PHP Admin my eyes glaze over, I just don’t understand what I need to do. Sorry.

The only thing I can think that I’ve changed since everything was OK is I’ve updated wordpress to 3.9.1

Can anyone help please, I’d be very grateful

https://www.melaniemurphy.co.uk (just in case it helps)

Thanks in advance