Thanks for your query.Based on the facts that you have posted it appears that you have been treated very recently for kidney
stones and have pain in pelvic region since three days.
This is most likely to be due to residual stone( small Fragment of stone) in ureter
Please get your ultrasound
scanning of the abdomen done to rule out the same and consult qualified Urologist
for clinical assessment and further treatment.
I think you should be fine with antibiotics and anti spasmodic drugs for a short period of 5 days.