Thank You In Advance For Your Help. I Greatly Appriciate

Thank you in advance for your help. I greatly appriciate you taking the time to help. My 5 year old daughter has been having leg pain for 2 years. She has a partial dulpicated renal system with kidney refulx, i thought this was the reson for her pain but now know it is not. Her legs hurt to the point of crying, not wanting to get out of bed, walk, or play at all. Her pediatrician says its growing pains and refuses to test further. Should i be concerned and push harder for more test? Is this normal?