I'm 37 years old and have never been pregnant. But I hadn't been trying. I always had regular periods and wasn't on birth control pills. Last August, when I had my period, it wouldn't stop bleeding (25 days - very heavy).
I had bloodwork and an ultrasound (I was found to have one very small functional cyst). So my OB-GYN put me on Megace (40mg/day for 10 days). I was on the medication for 3 months and my periods went back to normal.
My husband and I decided we wanted to start trying to conceive in February. AF came on time in February, but then I haven't had it since.

So I went to the doctor last week and he said that he doesn't think I'm ovulating. Therefore, he put me on Metformin (500mg 3 times a day) to help ovulation, plus Provera for the next 10 days to jumpstart my period.
I have gained a lot of weight over the last year. So I decided to go low-carb while on these medications.
The doctor didn't say that I have PCOS, but by the symptoms of most people in this forum, it seems I might.