BV or yeast… I have both treatments on hand… start with BV?

I’ve had a handful of yeast infections during my life. Always after treating a UTI with an antibiotic.

Today I started having symptoms of something… odor, light discharge, itching on exterior. But I haven’t taken antibiotics anytime recently. And the smell is more than usual. I’m wondering if it’s BV. I just can figure out which it is no matter how many symptoms lists I read.

I have both treatments on hand - Metronidazole 500mg (for BV) and a Diflucan 150mg (for yeast).

I’m going out of country tomorrow and I’m wondering if I should just start taking the BV antibiotic and on last day take Diflucan to prevent yeast.

Any harm in that? Should I not do anything? Or Diflucan first??