Hello, since when you have urine infection? Are you taking any treatment for that? If not take treatment for urine infection and get it cured. Otherwise it may spread along the urinary tract and can affect kidney.
Since you are getting itching only during periods, it could be due to pads you are using. Use clean sterile pads always, maintain cleanness like taking bath daily or washing your genitails, it will avoid itching. If still not controlled then consult gynecologist.