I'm reading a book right now, Dangerous Relationships by Joelle Nelson Ph.D. And it describes abusive, manipulation as just what your mother is doing to you. I strongly agree with Pfrog. You should not have to be going through this. Call whoever you need to get you out of there and get your mother help. Do not let her manipulate you. Notice how you said you 'we're feeling sorry enough for upsetting her'? That's how she manipulates you! Talk to your school guidance counselor, anybody, get out of this!