In the current scenario, in view of your history of recurrent infection, I would suggest a thorough investigation and also examination of your sexual partner to plan further management. A vaginal swab for culture and sensitivity, urinalysis
, pap smear and also a cervical swab, sonogram of the pelvis, fasting blood sugar and /or AbA1c levels are needed. Metronidazole
is not the appropriate treatment in the current situation. You need medications like Ketoconazole
and follow up with prophylaxis is to be done for six months after cure. Hope this helps.