She wakes herself up, treats the lows, and then begins having horrible stomach cramps and diarrhea. This lasts approximately half hour to two hours.
Abdominal pain is quite a common part of the symptomatology of hypoglycemia .
So, the first step in dealing with this problem is to develop a rather detailed profile of blood sugars, especially during the early morning hours, over a few days. I expect you have already been working on this with the help of your daughter's diabetes care team. Correcting it may involve an adjustment between the amount, timing, and type of the evening long-acting insulin, and the type and amount of the evening snack and perhaps the evening meal too. A relationship to vigorous exercise in the afternoon is also something to consider. However, the episodic diarrhoea is not at all a usual accompaniment to hypoglycemia, and this raises the question as to whether there is some other problem even one that might itself have promoted the hypoglycemia.