On a personal note - don't stress! It doesn't do you any good and, believe me, you'll need your energy for other things. I don't know what you believe, but I can tell you - "if God brought you to it, He'll bring you through it."
Don't forget to take care of yourself. Get some 'me-time' - to keep your perspective. If you can, take a walk or a long soak in the tub. Especially, on those days when you just know that you could strangle him - with a smile on your face!
We just went through liver transplant surgery last June, after starting hospice care and then battling to get him listed. (And, yes, I do mean WE. Since May 2003, I've had to call his family three times to come say goodbye.)
Trust me - this is a cake walk compared to that.
Be strong! Be happy! You (both) can do it!