Help!

For the ladies that have had to take provera to help you start your period, I have a question. When I took provera back in October, AF arrived October 31st. I didn't have a visit from AF again until December 10th. My question is, when taking this medicine and you have your period, will that start to be your regular cycle or does your body still have to regulate after that forced period? I am trying to figure out if my cycle is 40 days( October 31st- December 10) or if AF that came December 10th is actually MY NORMAL cycle after my body regulated?? I hope that makes sense. Please help!