Re: Nursing 13 MO and suddenly painful?
It could certainly be the return of your period that's causing the sensitivity. Pregnancy is another possibility (or is it? only you know for sure!), and so is teething. But stay alert for more signs of thrush- that's a common cause of pain that crops up after months of pain-free nursing. And pain that can be described as "burning" is often thrush.
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!"