I fainted during sex...and still fainting 7 hours later

Okay so!

My husband and I have been getting a little kinky lately and trying new things.

This morning I woke up to him kissing down my body and rubbing his hands up and down me. That turned into him scratching down me as he sucked on my neck to my nipples. I rolled him over and began to suck on his dick and then he threw me up in the air to get on top of him. We were having sex when he choked me. (He normally does- huge turn on for me!) but as my heart was racing already he choked me (not too hard either!) I straight up fainted. He thought my body just relaxed on him!!!

Well long story short...... I'm still having problems later the same day. Feeling faint and passing out. Any ideas?....