Does this mean I still have a fast metabolism even though I am overweight?

My family doctor said I have polycystic ovarian syndrome but he said I still have a fast metabolism. Because I am a person who is about 30-40 pounds overweight all because whenever I eat too much, my ovaries always react towards the foods I eat. and that's how I gained so much weight, because I have PCOS. And ever since Before I started my period, I ate like a cow and was not able to really gain any weight, and I wasn't even that active. And as of right now, I am taking medication for my pcos and I have been eating alot of junk food especially sweets and drinking alot of soda and not even staying active and only gained 5 pounds in 2 months. Does this mean I still have a fast metabolism even though I have polycystic ovarian syndrome?