Breastfeeding with inverted nipples

Does anyone have any tips or success stories of breastfeeding with inverted nipples? With my first I tried nipple shields and the nurses tried to help me get my son to latch for 3 days but he never would. Being a ftm I was so stressed that I ended up going with formula. Now that I'm pregnant with my second, I'd really like to be more informed and try giving breastfeeding a second chance. Any help or advice would be greatly appreciated!