I had kidney stones (right side) last year after taking medicine I didn't checkup, in March there was a serious kidney pain so I thought it might be because of kidney stones, so doctors give checkup for ultra sound, blood checkup and x ray, I the reports are normal ,there are no stones, doctor gave "drolgan" tablet said to use whenever there is much pain, but after 2 months the pain started again, I expecting it might be kidney infection, please suggest me which lab test I have to take and medicine if it infection.