C.P.
Hello S.,
First, congratulations on the birth of your daughter!
I have a couple of ideas in regards to the yeast. I just want to recommend that you cut/eliminate as much as you can sugars and simple carbs from your diet. eat more yogurt and also take probiotics. when your body is very acidic, yeast thrives. change to a mild shampoo, & body soap...that could be irritating your niples. I wonder if it will help to 'air out' your chest. and make sure you're using a cotton bra.
Good luck and hang in there! ~C.~