For HIV to occur, there must be three things present. One, a fluid high in HIV. This could be blood, semen (pre-cum), vaginal fluids (menstrual blood) and breast milk. There has to be an activity eg sharing dirty needles, unprotected sex, breastfeeding and childbirth. There has to be cuts and tears or punctures and sores. It is only then that HIV can occur.
Also, HIV dies seconds after it heats the air.
I don't think you are infected with HIV.