If you're suffering from heavy vaginal bleeding due to rough sex, it may be time to have a talk with your partner. Sex that is so strenuous as to rupture something inside the vagina is unhealthy. If, however, you are suffering from abnormal menstrual bleeding, you should contact your gynecologist. He/she may prescribe hormones in the form of oral contraceptives to slow and regulate the bleeding. Extremely heavy menstrual bleeding is not only potentially harmful, it is at the very least inconvenient.