Pain,right side of mid back n flank at waist area(sharp or achey)come n go.sometime when pressed,pain worsen.had costochondritis due to cough.no uti.

See below: Of course not possible to make a diagnosis with such limited information and inability to examine, but your description suggests that the cause of your symptoms is most likely "musculoskeletal" (e.g. back muscle strain, sprain) and not "urological" (e.g. UTI, stone, kidney) in origin. A normal urinalysis would support that impression. Certainly, if continues to be a problem for you, see a doctor.