Thank you for your query,
As your child has been examined by the pediatrician
and there is normal examination and results, nothing to worry.
Children will get nonspecific pain usually around the umbilicus
and usually there is nothing abnormality on evaluation.
But if the pain is severe enough to wake her up from sleep, or associated with vomitings or loose motions then it will be significany.
Be in follow up with your Pediatrician.
Hope I have answered your query.