Hi. Thanks for an elucidate history. The history and the findings and the lab reports are well connected to each other . You had urinary tract infection in the past which I think was half treated. It is possible that you have an obstructing lesion in the right ureter like a stricture or so . Now this looks to be an Infection in the Kidney hence the reports. I would advise the following: First of all give the sample of the urine for culture and sensitivity before starting the antibiotics. Once the sample is given you have to get started on an antibiotic most suitable for UTI like Ofloxacin or so. Once the infection is settled and f your blood urea and creatinine are normal you should go for IVP- intra-venous Pyelography, CT scan of the abdomen. Further management will depend upon the findings. Once you start the treatment, do not stop till you get a complete relief