How can you tell exactly when you got pregnant? I am not sure if I am and hopefully I am not. I had intercourse the day before I started my cycle, my boyfriend pulled out that day. I started my regular cycle the next day, and it lasted the normal 5-6 days it always does. I could even tell when we had intercourse that I was fixing to start because I always cramp real bad the day before. Then I had intercourse with my boyfriend a week and a half later. How can I tell if I conceived the day before my period or if I conceived the week after my period. I am thinking that if I am pregnant I conceived after my cycle, but I would like to know is it possible that I could have gotten pregnant the day before my cycle.