I've been finding the early kicks come and go, sometimes it's a whole day without noticing any.
I reckon it's like earthquakes (wellingtonian) most of the time people can't even feel a 4, but if they're quite and in the right place they might even feel a 3.5. So there are probably kicks all the time that you don't feel because you're getting on with life.
When the little one is bigger, their kicks are bigger so it's harder to miss them.
If that sounds like crazy pregnant lady, then sorry.