I stopped taking birth control in July. I had my July period on time, my August period was about 3 days late and I didn't have a September period. I am testing negative both on the home test and blood test done by doctor. Doctor put on on a pill that's supposed to "force" my period to start (it's progesterone). They told me most women start 3 days on the pill to stop taking it once I start. I'm on day 8 and still no period. Has anyone else had this problem? I'm starting to get worried. Although they did tell me it may take all 10 days of the pill plus a week before I start.