Movement after 20 weeks ??

Zoey
Is baby movement supposed to be constant? My little boy typically moves daily and if not much during the day, then a lot at night time. I had my 20 week appointment yesterday and he moved his head once on the screen, when I got home I didn't feel him all day? I didn't feel him all night either, I did the typical routine to get him going and moving all around like drinking ice cold water, laying on my side, eating something sweet, walking around, sitting still, etc... And still nothing. Still nothing this morning either. Should I contact my doctor about this?! 😔 I'm a first time expectant mother and don't know what's normal and not normal. Any advice helps! Thanks.