I can't imagine what you are going through and I have no personal experience with this,
but I will tell you that I was allergic to peanut butter, dairy, pets, and grass when I was very young. I did grow out of it as I got older (around 7 or 8 I think). I later became allergic to pets again, but I have no problems with dairy, peanut butter, etc. I know it wasn't nearly as severe as what your daughter has, but there may be some hope that she will outgrow some of it eventually. Apparently all the cells in your body are totally replaced every 7 years, so that can mean that certain allergies can appear or disappear.
I have recently started going to a chiropractor in Columbia, MO. She is great. I know it sounds like your daughter's situation has nothing to do with a chiropractor, but my chiropractor was telling me about a close friend of hers who has been a chiropractor for a long time. This chiropractor had a family come into his office a month or so ago with a 5 day old infant. The baby had very severe reflux and doctors were about to perform surgery within the next few days. They adjusted the baby a few times and the reflux totally disappeared, no need for surgery.
She has told other accounts of people being cured of things you wouldn't dream could be related to chiropractic. She explained how all the nerves which go through the spinal column are what controls every function in your body, from the lungs, to motor movement in the limbs. When a nerve is pinched or sacrificed, the function suffers. They also mentioned that the birthing process puts a lot of stress on the spinal column and that adjusting a newborn can be very beneficial.
Anyway, PLEASE talk to a chiropractor to see if there is anything they can do to help before she gets put on more meds or goes through surgery. Try to find one that you trust, like one that a friend goes to or something. They can make it affordable--I pay $30 when I go and my husband pays $15.
It might also be beneficial to talk to a naturopathic doctor. I recently read an article about people who are put on medicines that actually make their situation worse, and once all the meds are flushed out of their body, they are totally fine. I am not some crazy person who is against traditional medicine, but I did do a lot of research on traditional and alternative medicines after my husband had cancer a year and a half ago. Some of the drugs that were used to treat his cancer make him more likely to get cancer later on, so I read up on alternative and natural medicine and nutrition as much as I could. Anyway, my point is, a natuopathic doctor would look at the underlying CAUSE of what is going on and not try to fix it with the first prescription that came to mind. They would look at fixing the root of the problem with methods that have zero side effects. That is also why I would recommend seeing a chiropractor in addition to a naturopathic doctor. I know it seems like they might be expensive, but if they could help cure the root problem, then it would probably be cheaper than all the $$ you would spend over the years on traditional drugs and doctors. I don't know, just a thought, but it's definitely worth looking into. At least then you would know that you didn't overlook any options.
I'll be praying for you, your sanity, and your family!
C. G.