Im 39&2 today. My LO hardly moves around... doctor said its just her getting ready. As long as you feel her at least move or push on you every now and then it should be fine. :) call ur doc if you get more concerned.
You should do kick counts!&maybe drink cold water & lay down on your left side & if your still worried u should call or come in to L&D so they can monitor the baby. Good luck & congrats!:))