The Beginning... I Guess?

This is the story about Nella-Salma (don't ever call her that though, she hates it. Just Nell will do).
She's just like any other 17 year old girl, but not entirely.
Oh and she's also mute, she hasn't spoke for nearly 2 years.
There's a big secret she's hiding and it's only a short time until someone will find out.
But who? And how?