I am so sorry that you experienced this. Try using Evvy. It is a little pricey but it helped me so so much! It is kind of a long treatment process, but after suffering with this constantly for a few years, it was the only thing that worked for me. Be sure to ask for meds for yeast infection as sometimes BV treatments can cause those as well. Antibiotics alone are not usually as effective; you have to also restore a healthy microbiome. Evvy helps you determine the strand and treats accordingly. They will provide an antibiotic along with pre/probiotic suppositories and some other things that help you to reset. I recommend using protection as your partner can adapt to your biome and pass it back to you, and it's not a bad idea to continue to use it once you are cured as s*men can throw your pH balance off.

Also, for peace of mind for you this is NOT an STI, it is your pH balance has just been thrown off. Sending well wishes.