Vinegar baths? Yogurt tampons?

I have been struggling with horrible vaginal odor for about a year. I also have heavy white discharge. I've been tested for every possible STD and STI, and for infections or a yeast infection but I have none of those things..

Is there any home remedies or supplements that will help with this embarrassing issue, quickly? I don't have a lot of sex and I've been with only 2 guys in the past 5 years so i have clue what's causing it.

I've heard to take baths with added vinegar a few times a week, or insert a tampin soaked in plain yogurt and leave it for a few hours. Has this worked for anyone? I'm so embarrassed that i don't know what's causing it...