Probiotics for good vaginal health?

I get BV often and my gyno says it can come and go on its own or I can take antibiotics if it doesn’t go away. I want to take something to prevent it from coming back in the first place. She also said periods can give BV.

Would probiotic pills help with that? Also what else should I do to take care of the health/ph down there?

I always pee after sex and I wash with dove sensitive skin soap but only a little bit in the folds and stuff, never inside. My gyno said it’s ok to do that.