Long story short, my girlfriend and i had broken up for a month or so, she had unprotected sex with another man, and he said he was clean and free of STD/STI's. We had protected sex 7 days after she had unprotected sex with this other guy. I dont know the other guy and dont trust what he told her, and i am just concerned that he might have given her an STD. if so, would she be able to pass that on to me a week after her unprotected sex. it has been about 2 days since we had protected sex and i am just worried.