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Nephroliathiasis-stones in kidney
have typical presentation as severe iliac pain radiating towards groin.
Small stones usually flush on their own only drinking enough of water is required.
Pain in the back occurs usually when stone produce an obstruction in the kidney.
It doesnot seem muscular pain
You need to see your physician again.
Do you have fever?chills?nausea?vomiting?abnormal urine colour?blood in urine?
you need tests:
Urine analysis of the stone to show what type of stone it is
Uric acid level
to see crystals and red blood cells in urine
You may need to change your diet to prevent some types of stones from coming back.
Wish you good health.