Dear Jean,
I actually think your daughter has
migraine headaches. Her loss of peripheral vision,
and the light
and sound triggers, plus your own description of "migraine-like headaches" makes me think this is the case. I of course am not a doctor, so I cannot argue with her current diagnosis of "Chronic Daily Headache." But if we suppose she has migraines, then I have a few suggestions that might help your daughter's symptoms.