Treated for yeast infection, went away, yellow discharge present with fishy smell. dr. said it's bacterial, how did i get bacterial if not pregnant?

Bacterial vaginosis: Bacterial vaginosis is probably the most common vaginal infection in women who are sexually active. It is the usual cause of a fishy odor. Yeast doesn't cause a fishy odor. Women who wipe back to front, wear thong underwear, wear underwear to bed and who have unprotected anal sex have very frequent BV infections. It can occur if not sexually active as well, just less likely

Not related: Bacterial vaginosis is not only in pregnancy. Anytime the normal bacteria of the vagina is disturbed, by antibiotics or the changes of pregnancy, either yeast or bad bacteria can move it. It isn't uncommon for women to be treated for a yeast infection, and a bacterial infection follows it. You can wait and see if it clears on its own, you can try vaginal probiotics, or you can see a doctor for med