The other day I noticed some kind of ulcer on the inside of my labia majora, almost at my vaginal opening. I am 18 years old and a virgin. I have never kissed anyone or performed any sort of sexual intercourse, or used sex toys. The day before I had a fever from a cold, and the morning after the sore showed up. It is irritating and painful and causes mild discomfort during urination. It also produces a discharge. I have had a history of yeast infections in the past. Should I visit a doctor or wait to see if it goes down?