I had unprotected sex ,for around 5 minutes, with a hooker who claims to have never had unprotected sex with anyone other than me and who was working as such for 3 months by then. She wasn't wet and we used coconut oil as a lube. I am uncut and I ejaculated in her. I do not have HIV until then (as I took a test 3-4 months before that and never had unprotected sex until then). I took a test after 28 hrs and found to be negative and then took a test after 1 month and then found to be negative again. I am still tensed because I find everywhere written that HIV could be detected even after 3 months. I am so tensed and want to find the probability of me having HIV. I found in the internet that it is 0.38 in a low income country. Although I don't have any symptoms of HIV I find my lymph nodes in my neck to be aching.