Miss,

How old are you?

I feel for you.  I agree with anita’s suggestion about leaving.  In the meantime, setting firm boundaries with your mother will help.  Whenever your mother starts in with her negative energy, declare that you cannot be in her presence for it drains you/upsets you/etc. and then leave the room.  Either go into a room where you can close the door to keep her from being with you or leave the house.

Keep doing that every time she does that.  Be persistent.  Be consistent.  Don’t stay to argue, justify, plead.  Make that simple statement and leave.

Mark