Not feeling movements👶🏻💙

I felt movements from 16 weeks with my little man. And I felt it pretty much once a day every day until about 18 weeks. They got a lot more faint and now I rarely feel him at all. Is it normal to not feel any proper movements yet? Im 20 weeks on Tuesday with my first baby and I have my scan and then. It's just worried me because of the piece on my glow today about feeling baby's movement by now. Just getting a bit concerned that's all. Thanks. ☺️💙