Give it a couple of days, because it might just be a minor rash and will clear up within a few days. How long have you had it? If you'd like to try something immediately, try buying a triple-antibiotic ointment, they cost around $10. They super-disinfect, and it might just be the thing you need, as the rash might have appeared from sweating or something. Hope this helps.
I should also note that I'm not sexually active - tis the life of a graduate student.