20 week movement

js103
Hi ladies, I'm 20+1 and am not feeling a ton of movement. When I do, it certainly isn't "definite kicks" or anything like people talk about - it's more like there's a consistent itch inside my belly. Anyone know if this is normal? My mind is running wild & thinking baby might not be okay, since it's been so long since my last ultrasound. Can't wait for Monday's, that's for sure!