I am 18 years old, I seem to have wrinkled skin on the head of my penis and around the rim of the head. I recently had unprotected sex with my girlfriend, but has had this problem before we met. She told me that she think she may have contracted a yeast infection, after the last time we have had sex. But we did it for a long time, lots of sweat, and she could have just not showered when she got home. Help please!