I'm so terribly sorry to hear about all that you are going through with your daughter. I just posted about my 13y/o daughter having suffered another concussion from running a 10k, the rammifications of which are just starting to settle upon me in a big way. There are things about your daughter's history that are very similar. My daughter also has had a lot of bad luck and we can't know how many concussions she has actually had--I know it worried me even before she had PCS the first time three years ago from a gymnastics accident. She has also had/does have symptoms of auto-immune problems and has an unusual health hx. including reactions to medications that may have further hurt her brain. My gut feeling is that high levels of neurological inflammation play a role in all of this in my daughter's case. And like you the medical establishment has not been where we have found what has helped. I think Mark's suggestion of looking into The Maker's Diet is a good one for sure. We have started acupuncture and I will take her for Craniosacral therapy if we can find someone again who is very, very experienced. Please keep us posted my thoughts are with you!