I Had Sex With A Woman My GFriend With PCOS

I had sex with a woman my GFriend with PCOS and is having blood spots during our sex. Two weeks ago I felt some itch inside my penis. There is nothing visual or abnormal on my penis, just this uncomfortable itch I'm having.. Is this STD? Is this cause by her irregular periods and during the last month of unprotected sex of at least 2x a week of this sex might have caused this itch? Is she infected?

What is the medical term for a man's itch after having sex with a woman with menstrual period? Should I drink antibiotic for this? Thanks.

Gerard