Hi pogo,
What a terrible situation for you and your poor daughter to be in. It is hard enough for me with spinal issues, Neuropathy, Hypersensitivity and Cluster Headaches as an adult with a multitude of powerful meds.
I do not know what relaxation techniques you are using, but I use Meditation. I still start each session with Simple Breathing Meditation, taught by Buddhists, but not Religious practice. Here is the Link to my Thread which has an external Link to my Tutor - Geshe Kelsang Gyatso's - Meditation site.
http://neurotalk.psychcentral.com/thread215669.html
The Breathing Meditation is very powerful and calming, and can be mastered quickly by someone of any age.
I do hope your daughter finds relief soon, this is no way to spend a childhood.
Dave.