felt nothing during the actual play but cried in the car ride home for like 40 min straight, is this normal

so this happened saturday and Im still kinda processing. were a couple in our late 20s, on the younger end of the scene, been LS about a year, mostly soft swap. saturday we did our first full swap with a couple we really vibed with, like really vibed with, drinks and a hotel suite and the whole thing. during the actual sex I was... present?? functional?? I came twice, his guy was lovely and patient, dh and her seemed great too, we did a same room thing for half and separate rooms for the other half. there was no point where I felt bad or scared or wanted to stop. it all felt fine and even good. then we got in the car at like 2am and twenty minutes in I just started crying. and I could not stop. for the entire drive home, like 40 minutes on the highway. dh was holding my hand and asking what was wrong and I genuinely could not name a single thing. I wasnt sad. I wasnt regretting it. I wasnt traumatized. I just had this huge wave of something coming out and it had to come out through my eyes apparently. next morning Im fine?? like genuinely fine. but the cry was so big and so unexpected that I cant stop thinking about it. did I dissociate during?? was the cry the real reaction and the during was the suppression?? Im 27 and this is the first time my body has done something I couldnt explain. anyone else had this. is this a one time thing. should I pause the LS bc of it.