Hydrogen peroxide douche treatment for BV, measuements?

I have a bad case of BV (reoccurring) normally I just go to the DR and get Flagyl and Cleocin. Now Im sick f waiting and about to start a Folic acid and yogurt regimen, and would like to get my PH balance on a head start down there. I know in small amounts the H2O2 is safe and effective that I know for sure I just don't know the Parts per measurements and etc, how much water per H2O2 etc, and should I add boric? If so whats the measurements on that?