Nipple healing

Kasie
When my son was almost 2 weeks old I got a horrible crack on my nipple. It was so bad and sore I almost gave up breastfeeding. Since then I have had help with learning how to nurse in different positions and correcting his latch however I canny get this crack to heal. Everything I have read says that once the latch issue is corrected then the crack will heal. The problem we are having is that he still latches incorrectly the first tries. I have pumped some days and have almost healed the crack but he will break it back open when latching. He is almost a month old now. Does anyone have any suggestions? It's so painful!