Suggest Remedy For Burning Sensation In The Urethra And Vagina

i am having full time burning sensation in the urethra n vagina, but my urine n blood test shows everything normal.i am 52 yrs and i had total laproscpic hysterectomy 6 months back..i used to get frequent urinary infection and underwent treatment and now my urine reports shows everything normal..but the burning sensation persists..the doctor suggests me to take following medicines
flavospas- thrice daily for 5 days, alka 5 two teaspoon thrice daily, evanova twice daily for two months, septran 1/2
tab at night for two months, libotryp tabs one at night for 2 months