How can I get my mum to leave me alone?

My mum had a gastrick bypass the beginning of the year (2015) and as she isnt getting enough protine anymore she has turned dumb now one of the things she is doing is shouting at me to go to school at 8:12 and I dont leave untill 8:30 and it is really annoying me now and she plainly wont leave me alone I dont even know what to do any more I have tried so much
Asked Dec 04, 2015

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