reoccurring bv :/

i keep getting bv after working long shifts at work. i live in a hot climate and i sweat a lot which ALWAYS results in bv and i hate it. ive switched my doctors so many times because its always a hassle for them to call in flagyl or any medication. i just got off flagyl a week ago but my period came after 2 years of not having it (im on depo) and now i feel a funky smell coming back on. idk what to do, it feels as if probiotics dont help any prevention . is there any way to stop getting it & get rid of it for good