Cracked nipples :(

Christina

So my son is almost 6 months old. After dealing with a tongue tie, over supply, bad latch, I am basically pumping only at this point. He will nurse only in the morning when he wakes up. It wasn’t an issue at all as I make enough milk but for some reason last week I got a cracked nipple. It’s healing very slowly but now the other one is hurting. I’ve changed nothing, same pump same schedule. Any thoughts about why this is happening?