Sounds very normal...

I remember this stage too & thinking that I couldn't wait until I started feeling bub move, cause then I would know she was there...and even now when I wake up in the morning I never really feel right until I feel her moving, like she is saying good morning
And even though this is no.4 & all the books etc say you might feel it earlier, I didn't feel it for absolutely certain until about 20 weeks.