Good evening, I had inter course with my friend, i am very sure that my penis wasnt fully in but while intercourse there was no bleeding from the vagina as it was our first time. My question is after about half n hour of inter course she had bleeding through her vagina. It has been 3 days she is bleeding now. Is this bleeding because of her periods or because of loosing virginity. As during inter course there was no bleeding at all and now she is bleeding and the symptoms looks like she got her periods. She has stomach ache, the flow is still going on after 3 days of inter course, So is it because of sex or this is just her periods?