Hi. I m 15, a virgin and had a very short period last week. Since 2 days ago I realised I had an ulcer-like sore inside my vagina right by the entrance. Its red/brown and has a whiteish layer that looks quite thick to the side. It s very sore and there is a reddish brown discharge. My other symptoms include pain when urinating, back pain , a constant headache, tiredness and it s also itchy. It feels inflames and sensitive. I haven t had this sort of thing before. I don t douche or clean excessively. What s wrong with me?!