Hey, Mom! So good of you to given so much consideration and thought to your own and the health of your daughter :)
How about freezing some of your breastmilk and giving it to her in a bottle? Would it have any means to comfort in that form? Frozen milk is not ideal, but it is still one of the highest quality food sources you can provide for you child. After you pump and freeze...you can cleanse! And after you have cleansed you can give you daughter even higher quality milk from your new breasts!
But it sounds like maybe your considering pushing her away from the breast feeding a bit? Did I hear that somewhere in your posts? Maybe this is the perfect time.