J.W.
It sounds like a possible UTI, however, cranberry juice has to be unsweetened b/c the bacteria feeds off of the sugar and unsweetened cranberry juice (UCJ) is not good. You can find unsweetened at Trader Joe's and dilute the juice. You can make a 30oz of water with 2oz of UCJ and give it to her all day until it is cleared.
I would also recommend a probiotic to help boost the good bacteria in her digestive track so she can fight it off naturally. If you do get prescribed antibiotics, then it will be a must and yogurt is not good enough, again to much sugar and artifical sugars.
Let me know if you have any other questions.
J. W. MPH
Wellness Educator/Lifestyle and Wellness Consultant