As I see it she has VUR. For this reason itself it is not necessary to do a cystoscopy. Firstly, it is most important to clear the urinary infection, which your child seems to have since she has cloudy urine. Next she must have a scan to assess the differential kidney function. If the affected kidney has no function and the infection is persistent, then your child will need removal of the kidney. However, if the kidney has some function it must be preserved. In any case, your child will need to remain on antibiotics for a long time.