I don’t know if I orgasmed

Me and my boyfriend have sex a lot.Normally multiple rounds at a time.To be honest,he is amazing.Every time he eats me out I get super wet and my legs get super shaken,sometimes I feel like I’m close to orgasming and then that feeling just goes away.Unless that is me orgasming and I had no idea.When we have sex he goes deep and rubs my clit so that I can have both sensations which feels amazing.Basically everything he does makes my entire body shake.How come I am not orgasming though.Or maybe I am and just don’t know? I need help and a better understanding