Get her into a good chiropractor immediately. They may not be able to totally remedy it, but they can often do a world of good and at least prevent surgery. Doctors often want to go right to surgery, but having a good chiropractor can really help a lot, and might be able to prevent that.
My wife has had 3 major back surgeries, including spinal fusions and titanium rods, starting when she was about your daughter's age. We both believe that chiropractic care would have been much more effective early on in her life than the immediate surgeries the hospital doctors recommended. There still may have been some surgery necessary, but not to nearly the extent that happened. Since she was about 21, she has had regular chiropractic care that has alleviated the majority of the pain she once had, and allowed her to function at a much higher level, like a completely normal person instead of someone handicapped.
Keep the faith, man. The doctors told her she might never be able to have kids, and might be severely limited. She's had three completely natural pregnancies and deliveries, and is for all intents and purposes, just fine! I'll definitely be praying for you, your family, and especially your daughter!!!