Wtf is Happening

It seems like everytime I get off my period I get BV 🤬 does this happen to anybody else? Like it’s always my last day and I’m thinking it’s the old blood smelling so foul & realizing it’s BV again but I JUST got tested which came back negative AND I got treated for BV 3-4 weeks ago. I haven’t been sexually active in MONTHS literally since April. Please help me 😔 I’m literally smelling it through my clothes and it’s making me feel awful. Do I need probiotics?? Just shoot me ideas I can tell my doctor