i have been on the pill for about 10 years and recently had my period 9/17 and ended 9/22 and did not take my pills that following sunday. Normally when i dont start my pills , i get my period again within a few days. i have not taken the pills since before my last period , and still have not recieved my period. also , the first time i had sex after my period was 9/29 . the thing is , i have recently started exercising and will be moving soon , could this be why i never spotted or started my period?