I'm sorry to hear about that, Drider_it. Losing loved ones, especially multiple loved ones, to a disease is never easy.
One of my grandfathers was diagnosed with lung cancer- never smoked a day in his life or worked where lung damage could have taken place. He fought it but lost a lot of weight from the chemotherapy and generally looked bad for a while. He also felt sick all the time and was barely active- he used to maintain a fairly large garden behind his house, that went away for a while. The shock his body went through because of the chemo pushed him over the edge and now he's mildly diabetic, though if he watches closely what he eats, he doesn't take insulin.
Cancer is just a terrible, terrible thing, and it weakens people so much that their final days, weeks, even months are spent in a bed. I wouldn't wish it on my worst enemy. You're right to be pissed off at the disease, just don't let it's specter haunt you too much, or you won't enjoy life anyway.
