Thanks for your query,based on the facts that you have posted it appears that you had Kidney stone and has under gone Extra Corporeal Shock wave Lithotripsy
.(ESWL) followed by removal of stone fragments and D.J stent was puting renal unit.
You have pain in abdomen at the same site.
This is either due to urethritis
that develops after ESWL and stenting the ureter
Please take broad spectrum antibiotics like Cefotaxime
along with urinary antiseptic like Nitrofurantoin
twice daily and urine alkaliser thrice daily.and later on switch on to appropriate antibiotics as per culture report.
Ensure to drink more water to help to pass residual fragments of the stone if left in ureter.