I was thinking it may be a possible ulcer. But, I don't think you would have a temperature with that. I recommend that you see your Dr and tell him/her all of your symptoms. Do you think you may have been exposed to HIV? If so, ask to be tested for it.
You may have an infection since you have a fever. It may be an ulcer or you could just have a virus either way you should see a doctor. So far there is no reason to think you have HIV symptoms. Be sure to keep drinking water and/or gatoraide.
Thank you very much I will ask my Doctor