Wa'alaikum assalam! 22 weeks tu dah masuk bulan ke-5 seminggu, so basically mid-way through trimester kedua lah. Tapi jangan worry, setiap mama carry differently, some orang perut besar awal, some orang baru nampak masa trimester 3, semua normal je depending on body type, muscle tone, and position baby, so xpayah compare dengan orang lain. A few of my mum friends pun dulu perut diorang xseberapa nampak, tapi baby sehat je, the important thing is what your doc says about baby's size and growth, so just follow up with them at your next appointment okay!