I'm a bit late to this thread but have you looked into RepHresh Gel?[1] It's a vaginal suppository that supposedly encourages lactobacillus growth. It's approved in the EU for the treatment of BV[2] but sold in the US for "odor elimination." It's definitely a bit pricey - $16 for about a week's worth on Amazon and from what I understand the EU guidelines suggest using it somewhat long-term to treat BV (something like 12 IIRC) so it's far from a quick fix.