I was taking the pill for awhile but i took it very irregularly and i have not been taking it for almost a month now. My boyfriend and I were going to have anal sex and he accidentaly put his penis near my vagina but it was only for a few a seconds. He had came around 20 minutes before then. How small or large are my chances of pregnancy? Normally I wouldnt worry but since I took my pill irregulary for a period of time. ( one pill then skip a day two pills and so on) im kinda freaked out.