Blacking out for a second during sex ? More explanation 👇🏽

So me and my boyfriend were having sex , it has been the same positions & the one position we did I was bent over and while he was hitting it from the back, I got real dizzy and blacked out for a minute, ( kinda felt like I was drunk, but I didn’t have anything to drink) it’s NEVER happened, is that normal or should I get checked? There is absolutely a chance I’m pregnant ( I have no symptoms of pregnancy like I did before my missed miscarriage) & I’ve been looking for the same symptoms even though every pregnancy is different