My boyfriend and i always have unprotected sex and he always pulls out when he is about to come. My period was 2 days late, i started to freak out cause i wasn't having any early cramps that let me know that my period is about to start. On the 3rd day, every time i would go to the bathroom i would bleed a little. It seemed kind of weird to me because it never happens. But that night around 11:00 pm, i began to bleed heavily. It is my second day of bleeding heavily and i dont know whether this is my period or something else? Keep in mind that i am only 20 years old.