I am on birth control, and have been for around 6 months. Last month I got my period/spotting lightly well on my third week of birth control pills, i did not end up taking the last two or three pills and i got my regular period but then started up on the pill 2 days earlier when my period was at its end. I was two days into my next pack of pills and I had unprotected sex a few times in one night. I was worried so I took Plan B closer to the 72 hour range. I am starting my sugar pills tomorrow but still have had no sign of getting my period but no symptoms of pregnancy either. Is it normal for my period to be late, and is there a good chance that I am pregnant?