if the pain is worse on your antibiotics then you need to consult your treating medical provider today. you may need a change in your antibiotic therapy based on your urine culture (hopefully this was done) a stronger antibiotic or further evaluation of your kidney pain. perhaps you have a kidney stone? your medical provider may order a kidney ultrasound.
uti a month ago and now i have a kidney infection. been on antibiotics for 4 days but pain in back is worse.