Thanks for question. There are few possible causes but from your symptoms it looks like vaginal nonstd infections such as vulvovaginitis, It may be caused by chafing or friction rub which occurred after intercourse or the second possibility is of an infection can be caused by bacteria or yeast. The other reason can be an allergic reaction to soaps, detergents, shower gel and condoms etc. I suggest you to follow up with your gynecologist as you need to get a pelvic swab sample done for the cervical discharge to rule out any bacterial or fungal infection. Apply cold compresses and wear cotton undergarments. Oral anti inflammatories like ibuprofen/acetaminophen are also helpful but they should be taken after a prescription from your doctor. Till that time, follow these simple lifestyle measures: Avoid using perfumed soaps and sanitary napkins, bubble baths and toiletries, Change the undergarment daily, wash it in hot water and double rinse Please feel free to discuss further. Wishing you good health.