13 days ago, I had a 0.1cm cut that was reopen from a dead skin on my elbow. A small drop of blood then appeared showing sign that it was not fully recovered. The same day, I did not wash my blood away and had skin contact with a stage 3 AIDS person. He was sweating a lot and I believed a big drop of his sweat had dripped into my blood. There were no injury on him and my cut was not a deep one. After 30 mins, I wash my blood away and observed there were a reflective layer of skin on it. Since then, I had been experiencing on/off mild soreness on my body but mostly on both of my legs. My body temperature also tend to range from 36.8 - 37.2 degree celcius while my neck often felt warm and stiff when sitting upright. Today a mouth ulcer grew on my left gum and when I lick it, there is a sharp pain. Are ars symptoms starting on me?