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Your daughter's symptoms look more a functional problem rather than an organic cause. However it is difficult to comment upon on basis of history you have submitted. Please furnish more details including her age, duration of pain, severity of pain, any loss of weight, appetite, urinary or stools related problems. If child is otherwise active in play etc and not losing weight it may be no disease as the symptoms are not fitting in a particular etiology. This is a common problem which aggravates further with parents anxiety
as kids are too smart to be believed. Relax, do not show her anxiety and if any of the above mentioed "red flag signs" see a pediatrician
Shall be happy to answer back and help you more if you provide more details.