Not much fetal movement today 19 weeks

19 weeks today and yes I have felt her early on today but tonight nada. Any ladies have this ? Im going for my anatomy scan Tuesday and im a ball of nerves. Im seen by high risk and at 15 weeks 5 days we did a early anatomy and baby was ok. I cant stop my thoughts from spiraling. And now that I haven't felt her im on edge. Any one feel this way?