Help! BV

Hey girls xx so I've had a pretty persistent BV infection 2 months ago and now I've gotten another one😰😭 what am I doing wrong? How do you guys fully get rid of it? Is there a possibility my partner can reinfect me? If not how do I treat him? Because my doc says theres no chance its from the guy🤔 but I'm sceptical? Also has anyone experienced sensitivity and soreness during intercourse after treatment? What is this😔

In desperate need of advice