Hello, Transient discharge soon after the intercourse is almost always due to the seminal fluid getting mixed with the vaginal discharge. If the discharge is persistent, has foul smell and is associated with itching, infection should be suspected and further management planned accordingly after a proper clinical evaluation. Please see a specialist to do so. Please avoid further intercourse until you get complete relief and if needed, your partner also is treated. Please maintain genital hygiene. Hope you find this information useful. Wish you good health.