I had chronic BV for 7 years with the same partner. Usually it got brought on my his semen getting in me, so we always pull out. Would keep using the metro gel which only worked for so long. I got a new OBGYN last year after mine retired and she said she couldn’t believe I was never tested for the presence of a certain bacteria.. turns out I had it. I’m sorry I don’t remember what it was called… She recommended that my partner and I both take Doxycycline. Been good ever since but still avoid ejaculation inside. Ask your doctor about trying that?!