Hello my name is Chris and my girlfriend and I have been intimate for quite some time now. And this is to say that on occasion we'd have unprotected sex. Now, one of the most recent time of intimacy, we had unprotected sex while she was "kind of heavy" during her menstrual period. I do know that any form of intercourse can bring about STD's/HIV. My inquiry is, am I or both of us at a greater risk of infection from this one time experience of unprotected period sex? Mind you we both are negative and they're have been times when we had unprotected sex, but I would say more often than not, we use condoms. And for clarification I am a 20 yr old male and she is a 21 yr old female. Thanks for taking the time to answer and assist me with this inquiry.