How do you avoid bacterial vaginosis having sex or not?

Me

My obgyn doctor says semon causes bacterial vaginosis,but what about when you try to conceive? How would you avoid getting bacterial vaginosis while trying conceive when your prone to them? Also trying to conceive or not after you shower after sex and you lay down after you wash your lady bits. All of that semon starts leaking out. I know that is probably normal,but what if that causes bacterial vaginosis to act up?