Ive been dating this guy which I really like for a while and we had sex with a condom once, then he told me he is HIV positive and is taking truvada, I like him n we r dating but me being HIV negative I can't help but worry if I got it already. What is the probability that I got HIV if he is on truvada and we used a condom? He mentioned he is not rcontagious n has the least aggressive form of HIV. He's been on treatment for 29 years and is undetectable. I just want to know what r the chances I got it that night, we only had protected vaginal intercourse.