I have a question: how can you know when are you having your first period before it happens like 1 day away?

Okay so literally no one can predict their first period exactly one day away, not even super grown-up doctors, because our bodies are kind of mysterious before that first one finally arrives. But you totally get big hints that it's coming soon, usually in the months before.

The biggest signs are other stuff happening with your body changing. You'll probably have breast buds that start growing a while ago, and you'll hit a growth spurt where you get taller really fast. The biggest clue, though, is usually vaginal discharge. It's like a clear or whitish goo that you might see in your underwear. That usually starts like six months to a year before your first period shows up, so it's a pretty good heads-up!

When you get super close, like within a few days or a week, you might feel some light cramping or a little bloated. Some people get kind of moody too right before, but that's different for everyone. Just remember, it all means your body is getting ready, and it's totally normal.