Omg! Im 21w 3d as well! How cool! And I was just saying how yesterday I barely felt him move and hes been so so active. It scared me. But ya know, dont worry, all days are different. Your babys okay, its normal. Drink a large glass of water quickly and soon I bet ull feel movement! (:
its normal
especially for the weeks you have tooo
sometimes bbys are just lazy or going through growth spurts
which makes them sooo silent in the womb
just make sure bby moves later on along the day
you should be goood
dont worry or else just call your ob :)