I have never had this happen before so I am wondering if this is normal? I recently started my period, on the same exact day I always have. It came normal and started out how it always does, heavy flow and alot of cramping. My second day was a little lighter then normal but not much. But then, when I woke up the thir day...nothing. Normal my periods are 3-4 days and are really light the last day. I have been on a birth control pill for about two years now so my periods are super regular. They start on a monday morning and are gone completley by thursday night/friday morning. But this time it seemed to be gone on wend morning. Could I possibly be pregenant? If so, when can I take a test to get valid answers? Or could it be the pill? Or is it the stress in my life? I had a very very very big stressful change in my the week before/during my period.