Kidney infection help

[ehite2]

I was recently diagnosed with a kidney infection, my right flank pain is still present and I still have spouts of feeling ill after taking 3 doses of my perscribed Anti-biotic  (ciprofloxacin). My doctor told me that I should feel better within 24 hours so I was wondering if this is  normal or if it is something I should be conserned about. How long after taking medication will my pain go away?