Maybe try a specificly designed wash for that area, you can get them from the chemist, it helps balance ph, you use it daily instead of soap or body wash. I would avoid the vinegar tampon until you ask your doctor about it.
I was checked for bv and stds. I'm sure she must have checked for yeast too.
That was one if the tests I was given and it came back negative. For the tampon idea, do I just do it once? How long would I keep it there? If it still persists do I do it often?
Don't overlook it if it is BV. While BV itself is not dangerous, it can cause pelvic inflammatory disease. Even if your ob-gyn scanned you for STDs, it is possible he or she did not swab you for BV. If it's BV, take your antibiotics, home remedies are not reliable.
you can get antibiotics (metronidazole) or you could try a tampon doused in vinegar to naturally adjust it. try ask your doc about it.