My boobs have barely grown

Gabby

So I'm 30 weeks pregnant, and my boobs haven't grown in the past 4 months.. I went up a cup size to a small C, but am still feeling like my breasts aren't big enough to feed a baby yet. I get colostrum occasionally. And my breasts aren't sore, which makes me think they're not gunna grow much more. Anyone else in the same position? I don't care about my breast size, I'm just worried that I won't be able to sustain feeding a hungry newborn.