Hi bettyboop
I'm sorry your daughter is in such pain. We are unable to diagnose her because we are not medical professionals, and you wouldn't want that for her anyway.
If she we my child I would see if I could get her to a pediatric Migraine specialist. Unfortunately there aren't too many of these around so you many have to travel a bit. But to have your child feel better will be well worth it. We have a list of patient recommend specialist you can see HERE.
If you are unable to get to a pediatric Migraine specialist, try a pediatric neurologist and see if you can find one who has some Migraine/headace experience.
Good luck
Nancy