I wouldn't worry about it. Light throat holding is a pretty common, even vanilla, kink. If he wasn't doing it with any force and has acknowledged your boundary and refrains from doing it again, I'd say there's nothing going on here of concern. Have you considered speaking to a counselor about your other issues? It might help a bit with the overthinking.
GET A BIDET
Either you’re 14, or a future member of the sex offender club.
I wouldn't worry about it. Light throat holding is a pretty common, even vanilla, kink. If he wasn't doing it with any force and has acknowledged your boundary and refrains from doing it again, I'd say there's nothing going on here of concern. Have you considered speaking to a counselor about your other issues? It might help a bit with the overthinking.