W.,
The sage tea and cabbage leaves are your best bet. I do need to say though, that reading that your little one is only 6 weeks old, you haven't had enough time to keep triggers out of your diet long enough to know for sure what she's reacting to. Milk can take over 8 weeks for all it's components to be out of your system.
I don't know what you've tried thus far, or for how long you've tried it, or even what your nursing habits are with her. All of which can be reasons why she can't/still can't seem to handle your milk.
I also recommend LilyPadz. They help inhibit leakage. You can read more about them here. <http://www.lilypadz.com/>
Blessings,
Rolinda
Wife, Mother, Friend