I've had the same issue for almost a year now. I've seen my gynocologist about 5 or 6 times. She's done a culture & confirmed it's BV. She was treating it before the culture with multiple antiobiotics. Nothing seems to help! It's very frustrating. I am now seeing a new gynocologist who prescribed a different type of antibiotic. He also said that stress can disturb the pH in your body which could be causing the BV. He recommended other things like exercise & getting the right amount of sleep to even out the pH. Keep trying with your doctor. Good Luck to you!
You would need to see your doctor and have them try other treatments. Sometimes it can take a few different kinds of antibiotics before one works. Its different for everyone.