With my first bub I definitely would go days without feeling movement between when I started feeling her at 15 weeks until at least 22 weeks, possibly later. Although they are big enough now that you can feel them, they still have *lots* of room so if they face inwards or whatever you might not feel anything for a day or longer.
With this bub I feel her moving alot for a few days, then I don't feel her much at all for a few days (we're in one of those periods at the moment!). It's normal!
I don't recall feeling movement every single day with Emily until I was in the mid-twenty something weeks.