BV isn’t an STI or any kind of infection. BV occurs when the flora/ph of your vagina has been disrupted through over washing and/or using so-called feminine hygiene products. The vagina is self-cleaning. Leave it alone.
If you’re finding yourself suffering with thrush, try changing your condoms to non-latex ones. Look at what lubes you’re using to - stick to water-based ones, no oil, no silicon. Remember, thrush is a candida (yeast) overgrowth, and much like BV, it is caused by the balances of your vagina’s microbiome being disrupted. Bacteria can also be a cause - others have found that banning fingering and RO have stopped them getting thrush.
Keep up the probiotics, and maybe consider looking at other antifungal supplements you can take. Also, yeast thrives on sugar, so consider cutting this back too.