Extreme obesity... can anyone help?

My name is Alyssa. I'm 24 years old and I weigh over 900 lbs. I can't accurately weigh myself as I can't find a scale that goes higher than 900 lbs. I haven't left my bed in seven years. The care of my sisters has kept me alive and relatively healthy. What can I do to lose weight?

Extreme obesity... can anyone help?
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