I was having sex with my girlfriend, and her period was due that day and during sex she started bleeding.. but it stopped moments later.. then the next day she still didn't bleed out.. so what do we do Im scared.. it wasn't because of her hymen cause I took her virginity back last year

How old are you and her?

Both 18

To be able to answer your question, we need your age (due to posting restrictions on Adult Sexuality Board), her age and what type of birth control you are using plus any background information that you and she think will help us understand what might possibly be going on.