This isn't directly related to your inquiry, but from your message, the first thing I thought of was the liklihood that calcium is flowing out of your body at a fast rate during your period lapses. I had similar irregular periods, and had a partial hysterectomy in my forties. I learned at age 52 that I had very severe osteoporosis and am trying to deal with it at a time when my body doesn't absorb it very well and my calcium level continues to decrease (there are medications that slow the decline). I was shocked, but it was true and was related in some part to my lack of periods for so long. One very encouraging aspect of your situation is that being overweight be helpful to you in this situation and you may not yet have a serious problem. Were I you, I would request a dexascan test to see where your bone density level is. You have time to do something about it.