hi i have had a problem for a few years now now it seems everytime i have unprotected sex with my girl if i dont shower right after or that day i have small flesh colored bumps appear i havent got tested for herpes but she has could this be a reaction or some sort of friction rash bc when she was tested for herpes the doctored said she did knot have it and we have been having un protected sex for 3 years now and she has now symptoms of it or anything she had the scrape test done and a blood test they both came back clean this was late last year what could this be please help