My boobs hardly got bigger during pregnancy at all. I’ve had 2 children and I stayed the same during each pregnancy. Nothing like what I was expecting/hoping for! I appreciate i’m probably quite unusual but it doesn’t happen to everyone. My breasts did increase when I was breastfeeding though. I went up a couple of cup sizes then.
The good news on that front (ha ha) is that naturally small boobs don't really go droopy, as there's not much to droop iyswim. Well that's my experience anyway. Did like having big boobs for a while though
I'm 6 weeks and mine have grown already. Need to measure to get a bigger bra. The only problem is being very slight it is noticeable already. We don't want to tell family before we know everything is alright and friends after family. I'm not a good liar though and if someone guesses and asks me I'll cave