Ihad Histractomy 2000.last 10 Years Suffering Uti .last 6 Months

ihad histractomy 2000.last 10 years suffering uti .last 6 months recurret infection december 2015 i went immergency for pain .they told me ihave kidney infection phylonefrytis.dr gave me oxybuton for over active blader.but it does not help.again suffering infection .now dr gave me estrace vaginal cream .i am useing this but from today i am feeling again lower abdominalpain.my pee no void.iam very upset about this.