sir, iam 38y old female.i got uti before 1mon.dr prescribe culture. e-coli org seen.i lltake 10days antibiotic course.but no improvement.atpresent i consult MD DGO,she advise citralkasyp,nitrofurantion 100 10days.atpresent i ll taking 5 days.but burning sensation in my urethra .is it kidney problem sir .i am worried ,pls help.