Wow, Torriluv, you do have it bad. My wife has three herniated discs from an accident back in December and she's finally having surgery for it in two weeks then will have lumbar surgery once she's recovered from that. Plus my son has fibro which manifested right around his twelfth birthday so I know how bad that can be. He's a college freshman now and has it mostly under control. Then there's my daughter, a college senior, who's never had a single health problem in her life and is afraid to come home lest the curse strike her too...
I think what I'm most afraid of during the pre-surgical dieting and post-surgical restrictions is a lack of energy. I can get winded climbing a flight of stairs now, so I wonder what it will be like with little caloric intake and essentially living off of my body's stored fat.
As for water, I'm ashamed to admit there are times when I've avoided drinking water because I know I'd have to get up to go to the bathroom and I didn't want to have to get up to walk anywhere.