Dear madam, coeliac disease isnt actually the first thing to think about. Did she have some other symptoms such as diarrhea or vomiting? There are many causes of abdominal pain
at this age but the most common are abdominal cramps, gastroenteritis
, appendicitis, gastritis, intussusception
, food allergies,pyelonephritis
, Gynaecological, Referred pain.
If it already happened as you said than she should do detailed work up includin some of the imaging tests such as US or CT scan. You should check that there is no some particularly food that trigger this pain.
Wish you good health, Dr. Ivan Romich