Sex kinks

So me and my boyfriend well we never really talked about what we like or enjoy and one day we were fooling around and he happened to put me in like a choke hold as choked me till I passed out for a few seconds and it had caught me off guard and I’m still not sure if I like it he’s done it a few more times after that and I told him I wasn’t sure about it but I’m not sure how I’m feeling about this situation?