You just gotta remember, Steph, that it always gets worse before it gets better. And daddy's already gone through the worst, so it can only get better from here.
Also, I view the unpleasantness of illness, as weakness leaving my body.
Like when I had sciatica in my left leg, and I was on steroids to reduce the swelling, every day my leg felt like it was in a vise, getting squeezed and released, over and over. Every day it did that, going down my leg one spot at a time until my back stopped herniating and the sciatica went away..
So don't look at daddy's symptoms, as him getting worse with the cancer. Look at it as, it's the weakness of cancer leaving his body.. And tell daddy to look at it that way too.