Sounds like major depression to me. I have never been able to think my way out of a deep depression either. All the CBT and meditation and mindfulness just don't cut it.

How long have you been taking the prozac?
Can you apply for unemployment benefits?
Does your state have a temporary disability program? I know CA does.

I agree with sophiesmom this thing is bigger than you can handle on your own and you should seek a pdoc and a T. Even if you are a T yourself. There is no shame in that. A doctors worst patient is himself.