I have PCOS and severe insulin resistance. I always ate well and exercised, but continued to gain weight (it was the high insulin levels) Anyway, I was put on Metformin combined with a low GI diet and exercise. I lost 13 kg, but more important it must have made me ovulate because I'm pregnant after the second month of trying \/

I would say you'll have some blood tests for hormones and a GTT next. You may be put on metforming wihtout a gTT, as I have hear this happening to quite a lot of women. Personally I can't see the point of being on metformin if your insulin levels are normal :-k