I know how you feel. I'm bipolar and I can't even tell you the amount of times people have told me that it's just hormones. People don't understand sometimes, or recognize the severity of the problem. I agree with the others that you need to talk to your parents about this doctor. Let them know that you don't think he completely understands or that he is helping you the way you need to be helped.
Try to remember that just because other people don't understand, there are still a lot of people who do. You're never alone in the way that you feel. There are always people around here who I know will be willing to listen and who can relate. You will find a doctor who understands and realizes that your problems are in fact real problems, and not just teenage ones.
I hope that things improve soon

I've been there, and it does get better.