Well, that's a bummer. Never let anyone talk you into having unprotected sex unless you are in a monogamous relationship. Do you know him? He says he is on Prep (to make sure HE doesn't get HIV). Hopefully he was. A one time exposure like this is low risk of less than one percent. That means there is 99 percent chance you did NOT acquire HIV from this. But it still was a risk, even though low. No, you do not need PEP though. That is reserved for people that have had unprotected sex with someone that is KNOWN to have HIV. It's a hard course of medication to take. Not warranted in this case. It is very unlikely that you got HIV from this but you should take a test a 4th generation DUO test at 28 days or beyond.