Suggest Treatment For Vaginal Itching With Burning Micturition

Am 30years old female,history of diabetes insipidus,on treatment (desmopresin) for past 15 years .8 months ago i delivered(LSCS) a male baby During the 3rd month of pregnancy onwards i was suffering from high vaginal and vulval itching and burning micturation,no vaginal discharge.During pregnancy i took cansoft vaginal pessaries-symptoms not relieved, till delivery i was using himalaya V-Gel then after delivery i took amoxylin ,fluconozole, tinidazole ,metronidazole, secnidazole, cifran-TZ, Itraconazole,Cetrizin,Fedin,ornidazole+oflacin.
Local applications- Candid lotion,Keto cream,
Ornidazole+oflacin combination reduces UNBEARABLE itching upto 80% along with the use of candid lotion.Am frequently taking ornidazole+oflacin tablets because of recurrence within 2 to 3 weeks..
KINDLY DO THE NEEDFUL