Urine C/S & R/E After Chest Antibiotics.

I'm diabetic since 5 years with sugar levels almost within control. Have symptoms of Urine Infection (UTI) like feeling feverish since the last 3 months with normal body temperature readings.Recently,sometimes feel burning sensation while urinating,sometimes feel very mild pain & discomfort in penis,sometimes feel mild itching in penis & sometimes have excessive urination.Urine C/S & Urine R/E to diagnose UTI or Urine Infection has not yet been done. Presently taking an antibiotic namely Tab.Clavam 625 (Amoxicillin 500 Mg + Clavulanic Acid 125 Mg) (1 tab twice daily after meals for 5 days) for chest infection caused due to cough & cold.Also taking some other medicines & an inhaler.Prescription attached. Need to know that after how many days of completing the antibiotic course for my chest infection should the Urine C/S & Urine R/E tests needs to be get done for diagnosing UTI.So that the reports come accurate,actual,error free & without any chances of false positives/negetives