How long after sex can you get bv? a couple weeks? days?

Any time: bacterial vaginosis can occur at any time not necessarily after sex. You need to be seen and treated.

No specific time: Bacterial vaginosis occurs with an overgrowth of bacteria in the vaginal area. This causes vaginal odor, discharge and vulvar irritation. Sexual transmission is only one cause and this usually occurs with new sexual partners or multiple sexual partners. Other causes of BV can include douching, antibiotic use, and decreased estrogen production.

Yes,: Yes you can get "BV" or bacterial Vaginois, within a couple of day to a couple of weeks after having intercourse. Bacterial vaginosis is an imbalance of bacteria causing a bacterial infection within the vagina or urethra of women. Men cannot contract bacterial vaginosis, but sexual contact with or without a condom between men and women, or sexual contact between women through touching and shared devices, can trigger the onset of bacterial vaginosis.