beta,
Have you ever been on prednisone?
After my diagnosis with UC, I was put on 2 rounds of prednisone, and soon after that I didn't get my period for 3 months. After some research, I started taking gelatinized Maca Root Powder every day in my protein shakes, and within a month my periods returned. I didn't take the Maca for my periods to return, but I knew that the prednisone had screwed up my hormonal system and wanted to correct it naturally, that's the reason I took the Maca. At 53, it's no picnic to still be getting my period (with the great pains and all), but my gyno says there are a host of advantages to keep getting your period and delaying menopause , i.e. osteoporosis, heart problems, breast health.
Anyway, perhaps that's why you and alot of the others here in response to your query have gone into such early menopause: prednisone?