I was recently tested and cleared of all stds. So since then I have been very paranoid about the things I do. Well I was fooling around with one of my friends, and he basically touched me and went down on me. Well he pulled out his penis and tried to put it in but he didn't have a condom on, so I quickly got up. His head didn't enter my vagina at all, if anything it just tapped it for a second. Now im very paranoid ever since my testing, and im scared that maybe I might have contracted something from my friend (if he has anything). Should I be worried, because his penis just tapped me for a second on my vulva? There was no penetration and he did ejaculate. Plus I didn't do anything to him, so should I be as freaked out as I am now?