Hi, Noted your short history of oral sex, protected vaginal sex, development of a simple small spot which got ruptured followed by development of few more. There looks to be a possibility of herpes simplex which is a sexually transmitted disease, can occur due to oral sex. Hence I would advise you the following: Do not self treat or apply anything till you show his to a Dermatologist and Venereologist for confirmation of the disease; visual appearance is of utmost important in proper diagnosis. He may send the fluid from the vesicles if present for lab. Hence an appropriate management can help you to get a proper treatment. You should strictly have protected sex of any sort. Also remember that you can spread this to another partners if you have, hence protected sex is a must to avoid spread also. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon