Help plz?!!

I had BV awhile back and went back to my gyno a few weeks ago and she said it was clearing up that me and my bf could have sex again after the meds are finished. So we did and it started burning really bad after we had sex when I would go to pee. For a week now after I finished to antibiotics I've been having a very watery discharge and very bad burning in my vagina like every other day like one day I'll be fine then the next day my vagina will feel like it's burning so bad like really bad. I've been tested for stds all negative . Idk why I'm still burning if she said I was cleared up. Old what's going on plz help?!!!!