I noticed a brown "liquid" in my underwear, I've never menstruated before, it lasted 3 days and was accompanied by mild pain

It's possible that this brown "liquid" you saw could be discharge or, perhaps, even a sign that your first period is on its way! It's super common for the body to start giving some signals before the actual period arrives. And it's normal to experience some mild pain too.

What it could be

This brown discharge, which some girls call "spotting," might just be a type of discharge that turned darker because it mixed with a bit of older blood. Like, the blood took a while to come out and then changed color. Or it could be the very beginning of your period, a kind of "rehearsal" by your body before it starts for real.

What to do

No need to worry, okay? If this keeps happening, or if the pain gets stronger, then it's worth talking to a trusted adult, like your mom, dad, or the school nurse. They can help you understand better and, if needed, see a doctor.

And if you want to get an idea of how close your first period might be, there's a quiz here on the site that's really cool and quick to take: how close is my first period?