I lost virginity in January if that has anything to do with it. In April, i had raw sex with my boyfriend. He got a little bit if sperm inside me. A week later I got my period but it was irregular. I usually have my period for five days with steady flow. But my period was for about four days and the first day was heavy and the last three days were steady. This month my period was only three days, extremely heavy the first day, and the next two were light. Is this normal?