my baby is 6 month old, She had fever 2 week ago ( temperature- 103).dr gave antibiotics dose for 3 days as urine infection detected in urine test. after completion of these dose again gave 7 days antibiotic dose for infection. Dr also prescribed for kub. so we didi kub then reports are normal only right kidney is mildly smaller. Also we again did urine test and report is normal. Now baby feeding well but during urination making sound and feels pain. So dr suggest mcu... so what we can do.. pls guide