I took the morning after pill 69hours after the incident and I experienced some of the side effects of the pill about 4hours after taking the pill and I thought everything was okay but then I got my periods for 3days which is shorter than I normally do coz they last for 5 days and the first day was normal but the last 2days I had a very light flow,could it be that the pill failed? Is it possible that i can b pregnant?