the reason that drinking lime juice helps is because both lemon and lime juice lower your PH. I know it sounds weird, but in researching the low acid diet, one of the foods that came out as low acid was lemon and lime juice, so I use them on my salads along with olive oil for salad dressing. I know vinegar is NOT low acid, it made my BV worse, I tried a lot of different things. douching with vinegar was helpful for a day, but BV is not a vaginal problem, it is a PH problem in your whole body. Try the drinking baking soda on an empty stomach, and implement the low acid diet and this problem will go away, at least it did for me.