I've been on Minastrin 24 Fe for about six months now. Every month previous to this one I would have breakthrough bleeding halfway through my pill pack, and my period then on my placebo week. I usually get my period on the first placebo pill. This month I have not had any breakthrough bleeding and it is my second day on placebo pills and I haven't had anything yet except for a yellowish tint discharge. My boyfriend and I use condoms most of the time, but when we don't he pulls out way before he ejaculates. (I know you can still get pregnant from precum). I've taken my pill every single day, however on some of the days we've had sex I took the pill 2-3 hours later/earlier than my usual time due to my work schedule. I've noticed back pain and nausea this month as well, could I be pregnant?