PCOS is deffo not a death sentence. It's a hormone issue and it can be managed! There are also a lot of supplements out there that are OTC you can talk to your doctor about that can help aid to healthier balance.
If your not getting the results you need with this doctor you may have to see another. There is so many different treatment plans for PCOS. The diet is very important and I don't know why they haven't explained that part to you!