Guys, I had a guy over who i met over the internet. We're both gay males. I was the bottom and he was the top. My concern is that before he put a condom on, he was rubbing his penis on my anus, which freaked me out because i felt he came too close to penetrate me. But since ive never had unprotected anal, any sort of funny feeling i get from anal stimulation, makes me think that a slight penetration happened. We discussed each others' HIV and STD status and he claimed to be negative, and not a drug user as well. If this was to happen, could a slight penetration render HIV poz? Im very scared, please help.