Bacterial vaginosis

A

Somebody help me. I ger reoccurring bv and it comes back after sex each time. Literally the next day I start feeling uncomfortable. I use the boric acid suppositories. I made sure to pee and clean myself right after. I take daily prebiotics and nothing keeps it gone long term. Can I use a suppositories each time after sex or is that bad. How often can I use them?