ive been on birth control for almost 3 months, when i have sex with my boyfriend we usually use a condom but my boyfriend and i tried anal sex and he came inside of me before he could pull out (with no condom on since it's okay to do that without getting pregnant). & i'm pretty sure none of it dripped down into my vagina and i wipped with a wet paper towel away from my vagina figuring it wouldnt get into me then. im currently on week four of my packet of pills which is the week i usually get my period. im a day late and im not sure if thats regular. i figured if my period had not started by wed. i would take a home pregnancy test. is there any way i could have gotten pregnant?