Your period will start at a random time—you may not notice that you are bleeding until you go to the bathroom to urinate (pee) and see blood on the toilet paper after you wipe. Your period will feel like liquid flowing (slowly, with starts and stops), out of your vagina and this is actually what really does happen. Although it may seem like a lot of blood, only a very small amount is released at a time. Read more about menstrual periods here: https://youngwomenshealth.org/2010/04/21/menstrual-periods/