I posted this question before but no one really replied my. best friend came over my house today and then he starts messin with me like he always does. He bit by arm playfully and left teeth marks but there was no blood, he scratched me and there was blood coming from my arm, and when he started to laugh tiny drops of his saliva hit my mouth while my mouth was open. And I also bit him but i didnt tear his skin, now I'm worrying if he had a bleeding cut on his hand and that my mouth would've been exposed to his blood. I'm scared because he has had many sexual encounters with random girls without condoms and im concered about hiv infection. what was my risk?