I feel a CT scan should be done to see the status of the kidneys & ureters, regarding the presence of the stones and hydronephrosis (swelling of the upper end of the ureters due to obstruction by stones). You need to watch for the urine output, any fever, any worsening pain in the flanks, any local tenderness etc. In case of development of these symptoms or worsening, you need to consult a urologist and seek opinion on the same. I sincerely hope that helps. Take care.