i have sore red ulcers in the back of my throat. I have had these for at least 2 years now. I went to the doctor and he gave me some antibiotics...they did not work at all! Recently i went to a GUM clinic to ask about causes etc. The nurse was very unhelpful and asked why i though it was an STD. He then mentioned an HIV test which freaked me out. He told me to go to my GP. I am sooooo worried now. Until recently i also had a type of white head on the side of my toungue at the back. I used a medicated mouthwash for a couple of weeks and this dissapeared but the ulcers have not. Please help all the info i have found about prolonged mouth ulcers point to HIV or mouth cancer but surely after so long i would have other symptoms. If i have been exposed to HIV in my past it would be at least 10 years ago.