I am sorry you all have suffered like this. However, I am excited to see how your daughter will progress.
I am about 6 months grain free. I have my ups and downs, but generally my foggy fatigue is gone. I am getting better.
I expect your daughter will get better too. I thank you for your care for her. There are many things to help.
I do the following:
Avoid or rotate intolerances
Be active and do excercise.
Sunshine (but in MN winter that isn’t always so much)
No major sweets
Cook from scratch
I had 30 years of bloating and symptoms in order to incorporate so many of these things into my lifestyle. I just present them as ideas to try as you go.