I've been on birth control for almost two years and I usually get my period on the Wednesday of my placebo pills but now it's Friday and I still haven't gotten it. Me and my boyfriend had unprotected sex about a month ago and he did not ejaculate inside me, but I'm starting to get worried. All I've had is a little spotting Thursday, and it wasn't really even enough for me to consider a light period, could I be pregnant or can this happen when you've been on birth control this long