My baby is now almost 3 weeks old. I thought the feedings were going well as he was gaining weight and having regular movements. Now my nipples are both cracked and very sore. In re-examining his latch, I think it is too shallow - so he's eating, but killing my nipples in the process. Now I'm afraid he's developed a bad habit that I won't be able to break him from. I keep working on getting him to open up wider for the latch, but he seems to let his bottom jaw move up when he's sucking. My husband has been trying to pull his bottom jaw down once he attaches, but it's still not as wide as it was in the hospital. How can I get my baby to latch with a wider mouth? Any tips?