This is a legitimate Health question, so please no one report it I'm just wondering, and I've been a little afraid to ask my mom, but does anyone know if it's normal if my menstrual cycle only lasts 3 days, the shortest it's ever lasted was about a day and a half , and I'm not sure why it even lasted that short of a Time. My family does have a history of endometriosis on my mom's side , and the women in my family on my mom's side have also had to have hysterectomies , part of me is a little worried that it might have gotten passed down to me . But at the same time I'm not having any severe pain . it's just my menstrual cycle only last 3 days and I don't know if that's normal or not, and like I said I'm afraid to ask my mom and I'm afraid to ask the doctor in case there's something wrong . But obviously I know at some point I will have to say something to my mom or a doctor ​