How can I permanently beat *chronic* recurrent BV??

Antibiotics only seem to make it worse, cause another infection such as a yeast infection or uti, or do nothing at all. I’ve been on 4 courses in the last 3 months. Been tested it’s not an std. Boric acid takes the smell away but doesn’t totally fix it, I’m taking probiotics also. Has anyone found a good regimen to get rid of BV without antibiotics?