First of all, eliminate all perfumed or deoderant soaps from the vulva and use dove, caress, or ivory which are mild and non-irritating.
Eliminate thongs, and use cotton crotched underwear. Get out of wet bathing suits, and exercise
togs immediately after use. Finally have a gyn md do a wet prep(or smear) of the vaginal fluids for microscopic immediate assessment of the content for infection.