Kidney Infection or just UTI?

Well Ive gotten about 2 UTI's so far in the last 5 months of me being sexually active and well as symptoms of UTIs I have (burning sensation when I pass urine, little bits of pinkish blood afterwards) and now Im having lower back pains and aches which I read can be kidney infection. Does drinking lots of water... show more Well Ive gotten about 2 UTI's so far in the last 5 months of me being sexually active and well as symptoms of UTIs I have (burning sensation when I pass urine, little bits of pinkish blood afterwards) and now Im having lower back pains and aches which I read can be kidney infection. Does drinking lots of water and cranberry juice ALSO get rid of kidney infection or obly UTIs? Please help. Thanks (:
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