I'm already a 38D and I am TERRIFIED about how much bigger my boobs will get! I already feel like my cup runneth over because they are so sore and swollen. I can't even sleep without a bra on because they hurt so much.
Anyone else have a larger chest or do you know someone who had one and had a baby?  Should I be worried that I will look like Dolly Parton?! 
Re: Busty girls
I am also a 38D. With my last two pregnancies I grew to an F. They did go back down though.
I was a DD/E prior to DS1. Mine mostly went down. I still had about 10lbs left to lose and told myself they'd have gotten smaller if I would have buckled down and lost that.
I'm already wearing my nursing bras from after DS right now at 8wks with #2...and that worries me.
This time I started as a 42 Double F. I anticipate being insane by the time my milk comes in. Maybe an H or an I.
LFAF Summer 2016 Awards:
A friend of mine is an a cup aa when she has lost a bit of weight and she grew to a c cup, which on her looks giant! She is about 5ft, 100 pounds, she loves it though. I guess to just expect at least a couple of sizes, no matter what your starting size is.
I miss my small boobs.
Same here. Except I'm 5'8" so I'm a stick with boobs... Or boobs belly.
So everyone is different but I don't think I got too huge compared to what I started with. I think it makes a bigger difference if you start out small and go up 2 or 3 sizes.