My parents are asking for more money from me?

So this is tough.. I've been helping my parents out for the past couple of years financially monthly because they were both laid off. Recently, i was also laid off, and i'm now struggling to pay my own bills and tuition for school. I'm receiving unemployment, their unemployment is running out, and they were just approved for food stamps which is great. Recently in two different accidents they have both become disabled and unable to work a normal job, including a desk job. They can't afford the mortgage or any other bills. In the meantime i'm sending out multiple job applications daily, but with no college degree yet. I feel tied down. I really need advice... because its just getting depressing.