I had the same issue after I had sexy time with my husband but after a day is fine. I read this online. Hope it helps! However if you don’t feel safe you may want to check with your gynae. Pink mucus or brownish discharge may both occur during the second trimester. It's caused by small amounts of blood leaving your body with normal discharge. Vaginal bleeding that's like a period, however, can be a worrisome sign that needs immediate medical attention.
Ginger