My son does that as well but I'm also teeny tiny so he doesn't have much room to move. What keeps me going is that he is still a baby and tires easily so as long as I feel him throughout the day I'm fine but if you are still concerned, doctors are there for a reason so it doesn't hurt to call them with any questions you may have
Thanks I just thought i was the only one im really small as well so i dont think he really has anywhere to move or go too