Hi N.,
How old is your baby? I think that is key to what type of milk you give her. If she is younger than a year, or even 10 or 11 months, I would just keep breastfeeding, or at least decrease the breastmilk and try the Dairy free drink someone else mentioned in another response. However, I wouldn't use that if your baby is younger than 6 months, especially if not eating solids yet. Personally, I would stick with something that is specific for infant growth and development, and I don't think that dairy free drink is...
I can sympathise with you. I went through the same problems with my two sons, who are 15 months apart, so it has been at least 3 years since I have had the pleasure of eating (esp. cheese), dairy, soy, now chocolate. I breastfed them both for as long as I could, but with the second one, had to greatly decrease the number of times I breastfed him due to extremely painful thrush that would not go away no matter what we tried. He was still only 8 months old when I finally decided I needed to try something else, and being very holistic minded, it was a difficult decision for me to put him on formula. We chose the Neocate, and he has done great on it. He loves it, seems to feel much better with it, and has even gained more weight with it (he was only in the 4th percentile, I think because I was still eating something that didn't agree with him, and I couldn't figure out what it was) I have looked into goat's milk, which has its problems, as well as home-made formulas, which used goat's milk as its main ingredient.
Anyways, my point is that you should find something you are comfortable with but is also specific to a newborn/infants needs, and stick with it. I know how hard it is to find formulas/replacements that are dairy and soy free, and I know how controversial all formulas are, but keep in mind that formula is a great second best. Children grow up just fine on formula. If you can tough it out a bit longer and keep breastfeeding, then you go, girl! And good luck to you!!!