I can definitely relate to the feeling of dead man walking because that sums me up at one point. I was dead emotionally, spiritually, and a missed heartbeat or two away from physically dead, like during a seizure, which I had. I was so dead inside, it still gives me shivers to this day.
The good news is that I could still walk. I summed up the courage to ask for help and reverse my direction. I began to walk, although it was more like a crawl, towards recovery. It has been worth every inch!