I'm 17 years old and I recently had unprotected sex with my now girlfriend about a week ago... after having unprotected sex twice i noticed red sores appearing around the head of my penis. It was like the day after that they started to show, it doesnt burn or anything but it seems to be spreading. Im really worried that I may have contracted an std such as herpes. My father is a docter but i fear approaching him about the problem right now. What im really asking is what else could it possibly be if not an std.... what should I do?