Helppppp

Okay so my first pregnancy I never had anything like this. But this pregnancy if not every day, then it’s about every other day, I can’t stand for very long without almost passing out. Whether it be moving around and vacuuming, doing the dishes, laundry, etc. I can barely make it through those without almost passing out and I have to lay down and rest because even if I just sit I still feel like I’m gonna pass out so I have to lay down and rest for about 15-20minutes before I’m able to get up and do more things for a few minutes. Has this happened to anyone before? I was thinking my BP. But every time I go to my appointments my BP is fine🤦🏻‍♀️🤦🏻‍♀️ so it’s not like they can ever tell me yeah it’s this or it’s that. So any advice ladies????