Stacy, I am sorry this is happening, I've been sending lots of good thoughts and prayers your way.
Sometimes things can rebound, I understand the thought of you prepairing yourself for the worst.
As far as people go, My Grandmother had horrible creatiine levels, was a DNR DNI and had a very large bowl obstruction after a hip surgery, dyalisis wasn't really an option either, well, she passed the obstruction, and made it out of the hospital, we did her physical therapy at home, that was 1.5 years ago, She'll be 98 in February and was recently dismissed from the Hospice program (she was a patient listed as "failure to thrive, believed that she would wither away to nothing). Her weight and blood levels have been slowly but stedily improving. Someties things do turn around. It isn't always easy taking care of my Grandmother, the doctors swear she is part cat, she is on life number 4 or 5 now we lost count, LOL.
Hang in there.