Bleeding For A Month Straight. Well im a doctor an i recommend that you should see one because that is not normal. Women expect vaginal bleeding as the uterus sheds its lining during menstruation. What's considered normal vaginal bleeding varies from woman to woman. One woman may have a period every 21 days, bleed for a few days and lose only a few teaspoonfuls of blood. Another woman may have her period only every 35 days, bleed for more than a week and lose several teaspoonfuls of blood. Both are within normal ranges of vaginal bleeding in the average premenopausal woman.