Boobs??🤔

Nikki
I'm a small gal 5'6 and my weight has never been over 125 (before pregnancy lol). I'm due July 23 I weigh 130 and my boobs went from AA to now a C cup in just 18 weeks 😱😱😱 I have other kids and I only experience this in the last two months but never this early...Are they going to keep growing?? Or is this normal??