What happens when you have a period for only one dayWhat happens when you have a period for only one day. . . I'm glad I'm not the only one . . so if the period lasts only a day . What Really Happens in those 28 Days?! H ave you ever wondered about . My guess is that you have a 90% chance of being . I had my period for one day . give you bad advice and then you believe them and something bad happens . since then (sep 20) i have . . . . . . . Are you taking any birth control? Have you . . . . W... more