precum worries

okay so, i just want reassurance tbh bc i kinda think i'm freaking out over nothing but hear me out. my boyfriend and i were in his car fooling around and he took his dick out and gave it like 2 strokes before i knelt down to suck him and then he proceeded to fold my shirt up, lower my underwear, and finger me while i did it. there may have been a very small possibility of him having a very little amount of precum on his hand before he went and fingered me but he did touch my shirt and my underwear beforehand and my legs too so whatever little amount there was, i'm sure it rubbed off. i don't remember well but i think he may have stroked himself after i finished sucking him off and then fingered me again, i kept asking him if his hands were clean and he replied that yes they were and that i shouldn't freak out. he hadn't ejaculated prior to that and had peed earlier in the evening and i read a study about some men ALWAYS having sperm in their precum but i know for a fact he doesn't bc he's had unprotected sex a few times before (not with me) and all has been well. i shouldn't stress right? also i'm not uneducated when it comes to sex, my anxiety just gets the best of me sometimes and i know the circumstances i'm in rn are HIGHLY unlikely, would just appreciate some reassurance

EDIT: just for clarification he didn't ejaculate AT ALL during the time we were messing around