I'm also currently 21 weeks and have been feeling movements on my lower abdomen since 19w4d. It felt like gas but when there's repeated movements, you'll be able to confirm it's baby movements. Heard from my friends who are further along or have given birth mentioned that it will soon transform into hard kicks. 🤣
It’d feel like your insides are twisting and turning. I’m 21 weeks along too, have given birth before so now my kicks are more pronounced. My tummy will start potruding out when baby kicks 😂 You’ll get to see this soon!