Ay oo, normal yan sa late pregnancy, lalo na by week 33 when your body is really working hard carrying baby! Ang mga friends ko naman, some of them experienced the same thing, parang ang katawan mo lang ay super tired at heavy, kaya kahit simpleng movements feel nauseating na. I'd still check with your OB though, just to rule out anemia or blood pressure changes kasi those can make you feel extra lightheaded and weak, pero honestly maraming preggy mums na dumaan dito at okay lang naman eventually!