Will my period come?

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  Every girl has her own unique internal timetable. Most girls begin their periods between ages 9 and 16. During the year or two before menstruation starts, the physical changes that happen are underarm and pubic hair, a clear or yellow vaginal discharge, breast development, and even a growth spurt. These changes all tell you that you will be getting your period. There is no universal "day before" signal.
Most periods begin with light staining, so there won’t be much to worry about at school. Wearing an Always pantiliner might help you feel reassured before you even start your period