Extremely Dizzy?

Shelby • Mom to a lively toddler boy and a sweet baby girl.
Went and had my ultrasound done this morning @35 weeks, and ever since I've felt extremely dizzy no matter if I sit or stand. I ate, I'm drinking water, and I even had a little sugar to see if that helps, but I still feel like I'm going to pass out. My blood pressure is normal but baby's heart rate is elevated. Any advice?