Which one works better toward getting rid of it for good? I have recurring BV and im sick of it! Ive been taking metronidazole forever and it works for only a month then it returns. HELP!

MATURE AND SERIOUS ANSWERS ONLY!! NO BULLSHIT…AND DONT TRY ME EITHER!

I went to my gyno for a pap smear almost two weeks ago, and it was discovered that i had BV. I was put on metronidazole (14 pill for 7 days), everything seemed to clear up, and my period came on time, but it was, and still is very dark dark red blood, which is not normal for me. Is this a possible side effect with taking metronidazole, an antibiotic? Has anyone experienced similar effects?