You're at tremendous risk of carbon monoxide poisoning. I would turn off the gas supply to the water heater immediately and get the unit serviced (if feasible) or replaced today. Meanwhile, you can go a day or two without washing clothes or taking a shower. Dishes can be washed in the sink with cold water unless someone is very ill with a highly communicable disease, in which case, buy a small supply of disposable paper plates, cups, and plastic utensils

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