I'm 34 weeks tomorrow and I took my son and I to get our hair cut, and I was completely fine all morning, ate, drank, was fine while my son got his hair cut, and then she had me sit down, the first 5 minutes or so I was fine, then all of the sudden my heart started palpitating, and I got really dizzy and started sweating ALL over, pretty bad. I had to have her get me water and sat still for a minute before the dizziness and palpitating would stop.