Hello dear
Understand your concern.
It is most common in women after sexual intercourse.
Dryness may be due to rough sex.
But unpleasant odor most commonly due to
vaginal infection mostly
bacterial vaginosis.
As sperm enter in to the vagina it cause changes in vaginal bacterial flora and ph and predispose to infections.
You take following advice
Tablet metronidazole
Lacto bacilli orally or vaginally
Hydrocortisone ointment
Shower with salted warm water
Wear pure cotton loose inner wear
Apply oil base lotion that contain vitamin and minerals
Wipe pelvic area after urination and sex
Avoid sex and douching till you get better
If not resolves contact the gynecologist
Pelvic examination
Do microscopy and culture , swab taken from urethre or vaginal dischagr
PCR, NAAT and
ELISA for STDs also
Hope this may help you
Best regards
Dr. Sagar