After an unprotected std scare I got std tested at 9 days all negative and then tested at 5 weeks 3 days for HIV(4th gen) and syphilis both negative. I still have this burning sore throat. (Been nearly 3 weeks now) been taking penicillin but it has had no effect 5 days from taken them. Back of my throat has lots of white blotches on it. Again I don't feel tied or particularly sick but my throat is on fire none stop. Any idea what it might be. ( concerning me due to my std exposure 7 weeks ago now. Could a sore throat like this starting 4 weeks after exposure be down to any std's? I didn't give or receive oral, only partial kissing)