I have been taking it for five days now and am still experiencing vaginal discomfort. I appear to have a difficult case. My gyno also added fluconazole for a possible yeast infection caused by the metronidazole as I am prone to getting them with antibiotics. Was treated for bv in early January with Tindamax which either only temporarily cured me or wasn't strong enough and it came back. Do I need an extended course of metronidazole? I'm worried it's just killing all the good bacteria that I am trying so hard to replenish (yogurt, probiotics) and that this is just one vicious cycle! Help!