Hello. Thank you for writing to us at healthcaremagic These sores, the way you describe them, do seem that they are herpetic in origin. Herpes has a short incubation period varying from 2-12 days. Unprotected sex with a friend 3 days preceding the sores is the likely source of infection. Genital herpes classically presents as multiple, grouped, discrete sores on the genital mucosa. The sores are usually painful. There may be burning sensation on passing urine specially when the urine comes into contact with the sores. Treatment of an episode of genital herpes is with Oral antivirals like Acyclovir, Famciclovir Or valacyclovir. I will suggest that you visit a specialist for a confirmatory diagnosis as well as appropriate prescription. Since unprotected sex is a risk factor for transmission of all STD s therefore testing for other STD s is also advisable i,e syphilis, HIV, gonorrhea, chlamydia etc Regards Always practice safe sex with a condom!