I will be 50 this year, and I had always been "regular" like clock work. When I turned 45 a lot of things went wack-o. I would have periods that lasted 7 days, and lingered 7 more. This went on until I had 3 months without a period and then I was back to regular period for about 6 months. then I had what I called predictable chaos. I got adolescent pimples (that I never had as an adolescent) and all that kookie pre-menstural stuff. My pds could last 3-10 days could be heavy or light accompanied by pain or not....There were a couple of times I had to go home from work, because I felt like I had narcolepsy!!!! and then 24 hrs later I would have my period....I's a crazy time. Just keep in touch with your ob-gyn and fasten your seat belt...it could be a bumpy ride!