Re: Baby using me as teether -- ouch!
Persistence is key when dealing with biting/chopping issues. Just keep ending the feeding, saying "No bite, hurts mama!" and putting her down. Eventually she will make the connection between what she's doing and happy nursing times ending.
You also might want to try to figure out when she's chomping. Babies often bite at the end of a feeding when they are just fooling around at the breast. You may want to be extra alert for bites at those times.
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!"