Hi Monkeybug83 and Welcome!
How frustrating for you and your daughter!
Does she complain of tummy pain before vomiting? Is she vomiting food or bile/liquid?
Please contact her doctor to have this evaluated, unfortunately it is impossible to guess what's going on over the internet.
It may be helpful for you to keep a symptom/food/activity journal (
similar to this one ) for the doctor to have a clear picture of what's going on.
In the meantime, this information,
Nausea and Vomiting , may be of interest. About half-way down the page vomiting in children is discussed.
I hope you find answers soon and please keep us posted,
Elizabeth