33w4d dizziness almost everyday

I have been feeling dizzy almost every day since week 32 and it usually happens in the afternoon around lunch time or after lunch. I feel lightheaded and heart racing many times but it's usually worse in the afternoon. Once I had blurry vision and cold sweat along with the dizziness while resting in bed, so I turn to my left side with my head slightly elevated and fell asleep. Few hours later it was ok but it's a scary experience. I have low hb on my last gynae appt (around 9.2) 2 weeks ago and have started taking iron since. Next week will be my follow up. Anyone have experienced the same? How do you deal with it?