I had sex with comdom two days later iam smelling a fishy smell wht can this be ? std ? but i used a condom

Probably BV: Bacterial vaginosis is a common condition in women where the normal balance of bacteria in the vagina is disrupted and replaced by an overgrowth of certain bacteria. Bv is not a sexually transmitted disease. It causes vaginal discharge that is usually white or gray. Most complain of a fish-like odor noticed especially after intercourse.