You have a Urinary tract infection
involving your kidneys. Which is called Pyelonephritis
. I could be more precise if you could explain why have you been to a doctor and what are other test results.
With this back ground i can say that your chances are good of getting it cured with IV antibiotics. The complication can lead to a failed kidney, perinephric absccess(Pus around the kidney), Pyonephrosis(pus inside the kidney) etc.
Hope you find my explanation adequate.Wish you good luck. Any further quarries are welcome.