The main reason I'm reading and researching this topic is because I've been having BV issues for almost 4 years. It actually started when I got divorced. This may be TMI, but I'm starting to think it may be relevant: my ex-husband and I had intercourse multiple times a day and we were together several several years. It almost makes me wonder if my body adjusted to that and then got thrown off balance when we split, and I'm older now and it just doesn't know how to go back?
Unfortunately, I'm allergic to ALL of the medications they give for it; tongue swells, skin gets itchy, mouth itches, heart does weird things, get shortness of breath, and so on. My doctor has ran out of options for me. We tried a different approach, and went with a less potent medication that isn't normally given for BV, but I don't have allergic reaction to, hoping it would help; it helped only while I took it for the 10 days it was prescribed.
Before I started experiencing BV chronically, I used to get yeast infections easily, even if I just ate a serving of yogurt or took an antibiotic. Then suddenly my pH balance went the other way, and I can't get rid of it.
Through diet, it has helped (I consume 1-2 tablespoons of raw unrefined coconut oil daily, rarely drink coffee, and there are some other things I try and eat or about to help). But any time I want to partake in drinking a little, it comes right back. Which I've recently learned that basically consuming anything fermented can cause the imbalance, and obviously I'm hyper-sensitive with my pH balance... So no pickles, kimchi, alcohol... Which is fine. I just want a solution for when I am symptomatic, right?! Which is usually after drinking, sometimes after sex, and around my period most of the time. It takes me weeks sometimes to get balanced back out with diet, and even then I'm not convinced it's actually going away. (Maybe I should start testing myself regularly?)
My thinking was; well if yogurt gave me yeast infections before, maybe if I eat enough yogurt I'll get rid of BV. I even tried using the yogurt tampon. I ate yogurt for months, and the tampon thing, no help. And no yeast infection. I'd almost rather have a yeast infection sometimes than BV all the time. 
I've tried apple cider vinegar, drinking a teaspoon of it a day. That actually helped, but caused tendonitis flare ups. So then I tried it on a tampon and other topical methods, but it didn't help.
I've tried taking baths with different ingredients, didn't help.
I've even tried tea tree oil (diluted of course) mixed with coconut oil topically. Did nothing.
I do take probiotics, especially while I'm doing any method where it's going to kill all the bacteria instead of just the bad stuff. I feel like when I do, it just makes it worse??
So I'm really interested in trying the peroxide thing! This is the first I've heard about it. I think I'll try it for a week, then maybe if it helps, doing it just after sex, drinking and around my period?
Please let me know if there is anything else I can do or try! I'm so tired of having this issue. I'm sure many of us are.
Thanks!