I have the same problemsas your daughter
Hey!
wow its great to finally meet someone who has the same problemes... well I was tested and got blood tests, Barrium swallows, x rays pretty much everything under the sun. I tested negative for lactose intolerance... but I did get to go see a natrualpathic doctor who helped quite a bit... I was told to go on different herb remedies and then to cut off wheat and sertain foods... well I'm not sure if it exactly worked... but 1- try a natrualpathic doctor
2- Get tested for CELIAC (a wheat intolerance disease) which I might have
3- cut off certain foods and see the results
4- Get tested for IBS
5- Get tested for Ulcers
6- do a barrium swallow (I know its gross but u got to do what u got to do)
also acid reflux may be the case
hope I helped