I am SOOooOOOoooOO glad you posted this! I was actually declared DOA at the scene of my injury... loaded on life-flight... revived... and coded a few more times.
I have over and over again thought to myself;
"maybe Im actually dead and just dont realize it yet...?" (YEAH IT SOUNDS CRAY!!) SERIOUSLY though... I have actually verbalized to a few people how I feel like Im on the inside of my own body but I only "partially" occupy it .... I see someone elses nose, their hands... I feel my mouth moving but, in whole, I feel incredibly detached from my body. I dont know how else to explain it.

So NO, you are not the only one.... nor am I (thanks to your post - thanks)