Updated October 31, 2014.
"Someone please help me! I am 14 years old. I am getting scared, I have not had my period yet or had barely any signs of getting it soon. I am going to be a freshman and would hate to get it during class one day as a surprise, does anyone have any ideas on a way I can make my period start sooner?" - PMS Forum visitor. Find out when to expect your periods to start.
When did you get your first period?