I never went to my GP about my panic disorder, my parents forced me to go see a psychologist because I had refused to attend school because of my nearly constant state of panic there. That psychologist referred me to a psychiatrist because she thought I needed some medication and cognitive behavioral therapy. I still see the psychiatrist, who basically just asks me the same questions each month and writes prescriptions according to how they're working. I take propanolol, clonazepam and of course, the mother of all medicines, cannabis, to combat my panic disorder. Nothing can completely cure me, and I've accepted that, but I can at least do my best to battle the affliction without causing too much harm to my body (aka suicide, becoming an alcoholic/hard drug addict). Well I went a little too far with that but I hope it helps.
Peace