Okay so Im on birth control, im only 15 and I had sex, but we used a condom, is their a change I could be pregnant? after we had sex we blew the comdon up and it wasn't popped, (no holes, and could hold air) Im just worried because Im on the sugar pill right now iv been on it for 4 days, i usualy get my period on the 3 day of the sugar pill! Their hasn't even been any spotting or anything, but my lower back does hurt a little. but do you think I could be pregnant?!?