Hi AJ, my name's Michael and I'm sad to hear of your failing health; I am sad that you have to face such a thing while still young.
But don't blame yourself too hard for the damage caused: it is so easy for us to rush ourselves and abuse ourselves to death. Almost every person alive will die earlier than they needed to as a result of their own choices, yet that short sightedness is a big part of being human.
Anyway, I have little to offer but my sympathy and good-will. May the remainder of your life be lived mindfully. May you let go easily when the time comes. And should you have another birth, may it be one conducive to the practice of dhamma.