I had sex with my boyfriend a day before my period was due that same night I was having cramping like I always do right before my period starts. That's the only time I ever do get cramps is the day before and the first day of my cycle. Well he had cum inside completely because I didn't think it was possible to even get pregnant a day before your period. Well now I'm 2 days late and I have no period symptoms aside from my boobs are sore. Is it possible that I'm pregnant? PS. I'm allergic to condoms and I'm not able to take birth controll I'm fully aware I can become pregnant at any time, but I don't see how this is possible. My periods are always on a strict 28 day cycle.