Weight isn't a factor in PCOS. You can be slender and still have it. Unexplained weight gain and difficulty losing weight is a symptom but not a cause of the disease. Saying so is ignorant, but don't take it personally - a lot of health care providers are deeply misinformed about PCO.
I don't take it personally. When my friend was diagnosed with it I read up on the topic, and I recall reading that obesity was a factor in PCOS. Therefore, I don't think I was speaking out of ignorance. If you say otherwise, so be it. I don't even talk to that friend much anymore!

I'm glad you found something that worked.

Karen