You said, Every day, I wake up and say to myself "Crap. I'm still alive."
I gurantee you, go to the doctor and have him tell you "I'm sorry but you have terminal cancer", and you'll immediately decide you want to live more than anything else in the world. Now suck it up and accept your responsibility to raise your daughter to adulthood and quit whining.
That happened to me in the ER in December (Christmas Day). I did not have cancer or a bad accident or even anything that couldn't easily be controlled, but my inner voice really chimed in with the please let me live chant.