HI
I wouldn't worry too much, I'm also having my 1st child, I didn't start showing until 21 wks and put that down to poking and prodding at the 20 wk scan, as for kicks they didn't come til 23ks and even now at 27 still not all day. Everyone is different and I am sure you will feel reassured at your 20 wk scan, hope this helps!
