Central abdominal pain accompanied with some of the following symptoms: nausea, vomiting, loss of appetite, pale skin, could be an attack of abdominal migraine.
Abdominal migraine is condition that is usually experienced by 5-10 year old kids.
This can be also due to stomach lining inflammation, hiatus hernia, irritable bowel syndrome, and other conditions affecting gut.
It is also important to get checked for her blood sugar levels, since diabetes can be manifested with central abdominal pain in people that haven't been treated or diagnosed yet.
Best wishes!
Marija