Period sex?

gracie
So my SO wanted me to do stuff since I was on my period and won't have sex. Well things got hot really fast and he was like "lets just try it" so I gave in. And right after I regretted it because I felt so nasty. Then he got mad at me because there was blood on him. Ummm common sense tells you that. I guess I'm just asking has anyone else had this problem?