I can't believe your mother could be so insensitive towards your issue in school. It just goes to show that she doesn't even see you as her favourite child. Every child deserves a good parent, but not every parent deserves a child. Even if this applies to child ab*se, you ddin't deserve to be treated this way.
I'm sorry that you had to go through this, but just remember that people over here care about you, alright? I hope things get better for you progressively.