Am i being abused by my mum?? what should i do?

Uhm, yeah. Your mother is abusive. You should call the cops or something, or do like the one person said and have a friend witness it. I would also try and record her saying this stuff or film her hitting you if you can. She's crazy. Go to the cops, child services and for your school to say they can't get involved is bullshit. talk to a counselor or something and take pictures if she leaves marks or your skin or show them to the authorities. If no one helps, if they all say there is nothing they can do, try and move in with someone else. You do not need to be there.