I started taking the pill (for the first time-- Ortho tri cyclen lo) the first day of my period which happened to fall on a Sunday. I took it at or around (on 2 days) the same time every evening. On the 7th day of my period (menstrual spotting was just finishing up that morning) I took the pill on time at 8:30PM, but my boyfriend and I had unprotected sex that night at around 2AM. He pulled out but I think there is always a chance of pre-cum. If, in a not-so-rare circumstance, he did ejaculate or have pre-cum, do you think-- given my birth control regimen and menstrual cycle, that I could get pregnant? We are a little bit worried about it and regret getting caught up in the moment.

Any advice would be greatly appreciated.

Thanks.