Bacterial Vaginosis?

Has anyone been diagnosed with BV? My doctor called this morning and said my Pap test showed bacterial Vaginosis. She prescribed me Metronidazole 500mg twice a day. It says not recommend for first trimester. I'm only 12 weeks 3 days. I'm a little worried about taking it but it seems that the benefits of taking the meds out weigh the risk. Any input would be helpful!