sometimes your body won't bleed when you are using the pill so that could be another cause - taking a pregnancy test will help you be more sure.
i missed my period last month for the first time other than pregnancy what could have caused this? . i started birth control three months ago and on my second pack of pills struggled to take them on time and on the third pack ended up switching the time i took the pills at altogether from 7:00 a. m. to 10:00 p. m. i still have not bled despite finishing my third pack of pills recently and my family doctor believes that i could possibly be pregnant.