But I haven't had my first period yet

Okay so it's totally normal to be waiting for your first period, and it comes at different times for everyone. It's not a race or anything, and your body is on its own schedule. Most girls get their first period between 10 and 15, but it can totally happen earlier or later too.

There are some signs your body usually gives you that your period is coming up. Like, one of the first things is breast buds, which are like small bumps under your nipples. Then you usually have a growth spurt and some white or yellowish discharge in your underwear. The discharge usually starts a few months to a year before your actual period.

If you want to know roughly when yours might show up, there's a quiz on this site that can give you an idea: how close is my first period?