If you had hiv for 3 years you would be dead by now since you haven't been hospitalized. Untreated hiv is a lot more serious sickness than your cold sore that your imagination has turned into hiv. Your problem is you don't have a scientific mind, and are thinking that because you have a cold sore that proves it is hiv - despite the fact that you had no exposure to hiv so you make zero sense - if you were correct then most people in the world would have hiv because most have have cold sores.
You said before that you don't obsess over hiv, but if you read your own situation you will see that is denial - seek help from a therapist instead of being in agony over your unscientific theory that you have hiv - then you might be able to lead a normal happy life like you used to do before you tried to come up with biology theories about hiv.
Are you still talking about the exposure you had 3 years ago where you used a condom?