Reduced movement at 30 weeks

Anyone else having a hard time counting 10 kicks in 2 hours? I find my little girl moving less. She still completes her kicks, but I have to really prod the belly or lay on the side to get her to respond. Had an US yesterday and the doctor said she looked fine. I asked if they could check to see if the cord was wrapped around her neck, but they said babies get tangled and untangled all the time. Kinda worried. 😐