Yes. Stop self diagnosing your self before seeing a doctor. If the first one is an idiot see another one.
You do not have HIV. HIV tests detect what your T cell count is, if it is lower then a certain amount you have HIV. HIV does not cause irritation on the penis, glans, and so on. You would be experiencing a whole set of different symptoms if you had something as serious as HIV. You need to take two tests, one now and one after six months to monitor the difference in T cells as well to be sure you are HIV free. Most doctors ask you to come in twice and get tested.
Since you have irritation and a fever, my most educated guess is that you have an infectious disease. Infection and fever go hand in hand according to House M.D and Grey’s Anatomy. Other sources like medical journals and the intermets concur (:
You are going to the doctors. If it is chlamydia and/or gonorrhea, you will get a few shots of antibiotics, or a prescription for some antibiotics and you will be fine. Seeing that you had symptoms straight away one of the two is most likely. Pray to god it is not herpes because that gift keeps on giving.
Anyhow, the reason you need to chill out is because you will start finding symptoms you don’t have. You jumped from a simple solution to the end of your life in a day. You need to first consult a doctor before self diagnosing your self.
If you go threw the symptoms of STD’s you will notice that very few infections cause symptoms directly after the sexual act. So, go see your doctor first, then start panicking if there is reason to do so.