Posted before but only received feedback from an unknown user, hoping to gain legitimate advice. I engaged in some mutual masturbation with rubbing of a penis head on my anus as I was being masturbated. as I came, I relaxed to the point where the next thrust of his penis actually went inside me..... I think. I have never been fully penetrated before, but this felt different then the thrusts on my closed anus. I think it is possible that the change in the feeling was just the head pushing on my back door enough to open it. but no pain or anything. I clenched up and moved so the next thrust didnt go in again. So if it did go all the way in, it was just a split second of being inside and then pulled out for the next thrust.
I asked about his status twice before the meet up and once afterwards when i was worried. first two times he just said 'yeah, im clean.' and 'yep' afterwards, after noticing I was worried he said he was "just tested for EVERYTHING and neg all around. You are fine, I promise." comforting words, but not enough for this hypochondriac.
I am worried that precum that was on his penis when the slippage happened ended up on the inside of my anus. SCARED. will test at 6 weeks but need some comforting thoughts please.