ol' cs knows what he is talking about. Forget pushing yourself until you just can't do it anymore. Bail out of the rat race at the first opportunity. It is part of what is killing you.
Many of us have talked on here about how stress demolishes us. Think about why that might be so. It didn't just come from nowhere. Stress was there all along, gnawing at our innards. It finally broke into the open with full blown PD. I am convinced that it is one of the primary causes of the whole thing. Cortisol is vital in acute circumstances but it is deadly in chronic ones.
Stop and go fishing now!