You need to see your doctor. Tell them your symptom and they do blood work. good luck
This is something that happens when hormones are not in balance. Same with an irregular period. Prolactemia happens when we produce too much estrogen or if we have an issue with our pituitary gland. Sometimes a woman will have a harmless tumor in their pituitary gland. I had this years ago. Thyroid dysfunction is often present as well such as a too slow of a thyroid or being hypothyroid. I had all of these issues in my 20's and in a year and half while trying to determine what to do to stop it, it self resolved. I worked with my gynecologist and had been referred to an endocrinologist. But did not have to go ultimately as my issues resolved on their own. so, your best bet is to see your physician for some blood work to check your hormone levels (and this has nothing to do with sex, whether you had it or not.) good luck