Re: 2 weeks old and continued nipple pain
Welcome and congratulations on the new baby!
What you describe does not sound like a problem related to "toughening up" or a strong suck (babies always suck before letdown occurs- in fact, sucking is what triggers letdown). It sounds more like a latch problem that is sometimes referred to as the "30 second sizzle." What's happening is that the baby's initial latch is too shallow, and the nipple lands too close to the entrance of her mouth, where it is compressed between the actively moving tongue and hard palate. After several sucks, the nipple is drawn into the back of the mouth, where there is less tongue movement and the roof of the mouth is soft (soft palate). When that happens, the pain ends.
The 30 second sizzle is very painful. But if you have already seen your cracks heal up, then things are on the road to getting better. You have to aim for a perfect latch every time (a visit with a lactation consultant, preferably an IBCLC, may help you achieve this), and also be patient! A 2 week-old baby has a tiny mouth, and that makes it hard for her to achieve a deep latch. But babies grow and their mouths grow, and soon she'll be able to get a deep latch right from the get-go.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"