<s>[INST] Hi. I had a urinalysis yesterday with no infection but some blood in my urine. I had stabbing pain yesteday on my right side on back that eventually went away. The walkin clinic gave me Levaquin 750 that I started yesterday. Also, Tramadol for pain. I had Pyelneohritis 3 years ago due to my right ureter being completely blocked. I had a cystoscopy with ureteroscopy then and they put a temporary stent in for 10 days. I have had no problems until now. Not sure if pyelonephritis or passing a kidney stone. Not sure what to do now. I currently dont have health insurance, so I havent been to the ER or a doctor yet. Please advise. Thank you [/INST] Hi. Thanks for using Chat Doctor.you have the past history of pyelonephritis which was treated with stent.now you have intense pain in the back, and hematuria followed by this.severe pain goes in favor of renal stone, and probably you have passed it, causing excoriation in the ureter which caused the hematuria...you need to undergo certain tests to rule out the pyelonephritis. Urine examination, ultrasound examination, ureteroscopy(recurrence).see your urologist for this.all the very best. </s>