He slapped me during sex should I be concerned?

we were having some great sex yesterday and it involved some light choking which I'm totally okay with. Then he went to choke me but he slapped me first and I was shook af. Then he did it a couple more times and I didn't hate it. So I'm not sure if I should tell him to stop because I dont hate it but I'm not exactly sure if I like it either. pls help. Do any of you SO do this and do you like it? BTW : It wasn't hard it was just a couple little ones like. some of you are thinking he pimp slapped me of something