Gardnerella

I don’t know what to do anymore! I’m so sick of meds and having to worry and be self conscious. Anytime my SO & I have sexual intercourse for days after I’ll have a fishy gross smell to my vagina. I can smell it just sitting on the couch or laying in bed. I pee immediately after sex and wash it whenever I can. I’ve been to the dr multiple times for it and I always end up with Gardnerella. Anyone else? I pray I am not the only one with this problem.