I had unprotected sex a few months ago and knew my partner rather well, she said she had nothing wrong with her as did i, i had a check not long before. Well recently i've had a burning on the outside of my penis and only on the right side of it near the base. There are no other symptoms of anything, no visual rash, no nothing. And the woman has not experienced anything either. It did go away for awhile but then it came back, and it doesn't burn all day or anything only seems to burn at night when i'm in bed, any ideas??