Dizzy spells

Marja

So I’m 31 weeks and 4 days and lately I have been getting very overheated and dizzy. Even when I’m sitting I feel like I’m going to pass out and the room starts spinning and I get short of breath, I keep a bottle of water with me all the time but i really don’t know what else to do, I’m scared I will pass out at work. I have told my doctor and she says it’s normal and to stay hydrated but I didn’t experience this with my daughter at all. And my blood pressure is normal, should I go to the hospital?