Suggest Remedy For Constant Burning In Vagina

i have recently gotten tested for gohnereah and clamidaya sorry for the incorrect spelling. thy all came back negative, i've been tested for hiv as well a few months ago, but i'm still feelig a lot of constant burning in my vagina, the doctor put me on metronidazole 500 mg for 2 x's a day for 7 days. nothing has helped could someone please help me