Big Boobs- question for moms who've breastfed

I am 5'2" and have always had very large breasts for my size. I am 140 lbs and wore a size G cup before pregnancy. Because my boobs aren't really proportionate to my size, I didn't really think they would grow in pregnancy. They are growing some and are getting to be very painful. Just wondering if anyone that has breast-fed before knows if breastfeeding is more painful for larger boobs or smaller, or if it makes a difference? Are there any issues I could run into being a larger busted girl breastfeeding? I know the question is kind of vague, just not sure what to expect! Thanks!