Endometrial ablation and watery discharge, flagyl helped for only a week

Hi

I had a endometrial ablation  on 12/22/16 and I am still having watery discharge. I went to the Dr and he prescribed  me Flagyl  for bv. It did help for a week but now  I'm having the same watery frequent discharge. Is this normal to have watery discharge almost 3 months post surgery?