Baby slowing down

Be

I’m week 36, 1cm and 50%.

In the last two days since being checked Monday, I feel like baby has significantly slowed down and isn’t moving nearly as much. I still feel him, but not as strongly or frequently. I have an ultrasound scheduled for tomorrow anyway and will ask, but wondered if this happens normally? I know babies will slow down, but how much slowing down? 😆 what’s too much?