When to be worried??

I know I’ve seen on here women posting they haven’t felt their little one kicking for a while and are worried. And I tend to join the “everything should be fine” comments. And then I realized I haven’t felt anything most of the day. I am 23 Weeks. So when do you actually get worried that you haven’t felt anything?

I went from a super active little guy on Monday to barely anything today. So my mama heart can’t help but start to think the worst.