Diagnosed With Bv By My Gynecologist Last Thursday & I've

Diagnosed with bv by my gynecologist last Thursday & I've been on flagyl since then. Now I have a real bad yeast infection. I used the generic one day treatment last night and it seems a lot worse today. I am still itching, burning, swollen and red. I've read that I can dip a tampon in plain low fat yogurt with active cultures & leave it in for a few hours...is this really safe to do after the one day treatment? I am taking a probiotic & eat yogurt every day but still got the yeast infection from the antibiotics. I also tried to relieve all the symptoms today with a sitz bath & added a little bit of 3% hydrogen peroxide & it did not help.