It sounds like you have nothing to lose? If you apply and don't get it, will you still have your current job? For me, the biggest risk would be if I did get it, could I keep up with the pace or would I fall apart. I would be loath to give up disability for a job in which there might be a high risk of not flaming out. So, risk control: if got it and it didn't work out, would you be able to get back on disability?

Difficult questions. Good luck! Let us know what happens!