Do Water And Cranberry Juice Help In Reducing UTI?

I just took an Azo test strip test to see if I had a uti. I have a very mild feeling that I need to urinate, and very mild lower abdominal discomfort, but no pain urinating, no frequent urination, no fever. I am not pregnant and do not have any stds. The test showed either trace or mild positive leukocytes and negative nitrite. I have had MANY utis over the years, and I know it is not yet a "full fledged" infection. If I drink enough water and cranberry juice today, is it possible that it will not progress, or is it more likely that it will only get worse by tomorrow, and I would be better off going in to the doctor today?