Well what we usually do here is that we order child to come nest day and repeat tests.If we see lab signs of progression of inflammatory markers
then something is wrong.
This can be appendicitis
, CT doesnt need to show it. Also this can be due to renal colica or urinary infection. Just wait and see is she gonna feel better,nothing serious will happen in few days. If you notice fever
or intensive pain wih muscle guarding then go to hospital.
Wish you good health.