Yesterday while at the gym I was washing myself and noticed that I have 3 small black marks around my groin. (One directly on the scrotum between the sacks, one on the left side of my shaft, and another one on the right side of my shaft) All are located on the blood vessels as I can see the blood vessel than the black spot on it. (Is there a way I can post a picture? As I have a digi cam here and if someone can host it that'd be great)

Is this cancer? or what? I know awhile back ago, 2 months or so my g/f and I had a 3some with one of her friends so could I have picked up something?

I've also noticed the lining around my eyes have gotten ever so slightly itchy, not sure if it's hay fever or not but i've never allergies before.

I'm going to see a doc this friday, but I'd like some advice ahead of the appointment.