Aw, totally normal yan especially kung first time mo! A few of us moms didn't feel clear kicks until 22-24 weeks pa, lalo na kung anterior placenta mo, it's like may cushion between baby at belly wall mo kaya mas delayed ang feeling. But since you're worried, I'd really suggest checking with your OB just to ease your mind and confirm baby's doing fine, okay? They can do an ultrasound at least para makita mo talaga yung baby moving around, which is super reassuring! Don't stress too much, momsh, bawat pregnancy talaga is different, and 20 weeks pa lang yan.