Your uterus basically moves upwards 1cm per week - so at 16 weeks the top of it should be roughly 16cm from your pubic bone, which is how they do rough measurements at check ups. Not that accurate but gives a rough idea! At 16 weeks the top of your uterus is roughly halfway to your belly button and bubs is pretty small still, so you might not feel big kicks for a few weeks when bubby runs out of room! Ive felt flutters but I remember I didnt feel alot of movement until 21 weeks with Izzy and then around 24 weeks for actual big kicks!
Hth! I can't wait to be booted regularly again either!!