I am 21 weeks tomorrow. Thursday I was in ER because I about passed out. Gave me some fluids lightheadedness went away. 3 days that followed were dizzy spells. Today a floaty head feeling. Checked sugar BP and anemia and thyroid everything came back clear. Said it was dehydration mixed with my vertigo that I get because of allergies building pressure in ear canals. However the OB said many woman experience dizziness and lightheadedness throughout pregnancy and it is fairly common? Am I alone in this because this is my 5th kid and NEVER have I dealt with this.