Slight itching and fishy odor later in the day the same day of unprotected sex. would stis present that quickly, or is this more likely bv? partner and i discussed having been tested and both being clean; offered to let each other see results.

Bacterial vaginosis: No infection, STDs or any other, can start to cause symptoms in less than 24 hours. Preexisting BV is much more likely. Among other things, fishy vaginal odor more noticeable after sex is one the most common symptoms of BV. BV is often triggered by other STDs like gonorrhea, chlamyida, and trichomonas, so you could test positive. Good idea for both to be tested and share your results. Good luck!