Women with PCOS! Does any else have this problem?

I am a very overweight 21 year old female with PCOS. I have steadily gained over 65 pounds in the last 3 years and there is nothing on the face of this earth that I can do to lose it. The doctor said that I have Insulin Resistance so I cut out all sugar and took Metformin and I still did not lose weight. I also exersized, ate several small meals each day, took appetite suppressants, counted calories, carbs, and did weight watchers. I still haven't lost 1 pound! What other options are there for me? I have been to 7 doctors and they all are out of options. Is any else in my situation? Were you ever able to lose weight? What else can I do to lose?