Tips on preventing BV and maintaining a healthy Vag

Hi ladies, or gents.

I really need some tips on preventing bv and caring for my vag health..

I noticed that after my period, about a couple days, I have symptoms of bv(yellowish sometimes grey discharge with an odor) and I do take antibiotics for it when it happens.

The medicine works but it always happens after my period!!

What do you guys recommend on how to care and possibly prevent from this happening?

P.s. I do smoke cigarettes, my diet isn’t the best tbh....