Should I go in?

36+4w and I had a dr appointment this morning. I woke up really thirsty, got a McDonald's sweet tea on the way, and drank it kinda fast. Got to the dr, and threw it all up! Felt weak and lightheaded. Dr checked baby, heart rate was fine, my blood pressure which has been high was lower than its been the whole pregnancy. Came home and laid down, and I still feel awful. Baby is still moving, but I literally feel like I have no energy, even to grip my phone. My hubby said he would take me in, but I don't wanna be ridiculous. Is this lightheaded, awful feeling normal?