It sounds like you're really struggling and are rather frightened. You have done the right thing by going to your GP, it's a shame the Mental Health Nurse was so dismissive, they aren't all like that, sometimes the information we give them isn't fully understood (I say we as I've had an unsatisfactory experience with one, and many good experiences with others), which is not your fault, you aren't a mental health expert (and nor am I!) so, getting your message across can be difficult at the best of times, never mind when we are feeling like crap!
Go back to your GP, and try to tell him/her as much as you can about the way you feel/think, try to explain your past experience with the nurse - that you felt they were a little dismissive (it helps to try and be diplomatic!), and, maybe, ask to see a psychiatrist.
Try not to worry too much, you've already started on the first steps to try and sort yourself out, it can be a hard path but, don't give up. I've not been on this site for long, but, there are a lot of supportive people here, so keep posting, it's good to air this stuff, especially to people that may have some insight and can give you some feed back. I don't want to sound too spooky, but, remember YOU ARE NOT ALONE!
