Thanks so much for your help everyone, I really appreciate the time you've all taken to answer my question!

and in answer to statement pinksoil about my GP, he rather shocked me actually! When I finally made myself go to the GP I was terrified because I thought he'd just say there was nothing wrong with me (like the last one did....) or just throw drugs at me and not be very helpful.... but after I explained everything he looked at me and said...

"Hmm, what I think you need is to find a counsellor or a therapist and talk about this with them. I mean, it'd be very easy for me to just say "you're depressed" and throw drugs at you... but I'm not going to do that. Now therapy is not going to be easy, but I think that's really what you need right now."

Now to me, that was the talking of a good doctor!