Hello and thanks for posting your query.
Your daughter is unlikely to have leukemia
is unlikely as the bloods are normal as mentined by you.
Howevr, a repeat blood examination can be done and also a test for celiac disease
can be repeated.
An X-ray should be done for the arm and leg pain.
For constant abdominal pain
can be done to rule out any abnormality in other abdominal organs.
I hope my answer is of some help to you.