Boobs

I’m 34 weeks & I want to breastfeed when the time comes. I was just wondering how it would affect my boobs? I’m somewhere around 44DD, weight 247lbs & my boobs aren’t really perky. How big did they swell? How bad does it hurt? will they go back to normal? Will they sag or get smaller?

(I’m not making my breastfeeding decision based off of what it will do to my boobs, I’m just curious!)