Is there anything i can do or take to stop it bv from coming back?

Restore balance: BV is not an infection. It is an imbalance in the bacterial flora of the vagina. The main bacteria is Lactobacillus acidophilus, like what's in yogurt. It is a probiotic, or healthy bacteria. In BV, the healthy bacteria is missing and abnormal bacteria overgrow. Metronidazole, orally or vaginally, with suppress the abnormal bacteria, while taking probiotics will help restore the normal.