Scared about period????

Since you are 13 and have not been having a period for quite a year yet, it is sometimes normal for this to happen. Stress can cause alot of problems in women. Sporadic periods, and you can even have two in one month if you are too stressed. Since you know you aren't pregnant, I wouldn't worry too much about it. If you are still concerned after you get all the answers on this site, then talk to your mom, a female adult figure, or your school nurse if she is a woman. However, if you don't start your period by say November 1st, your mom may want to take you to the doctor for a general physical exam.