I'm sorry to hear about the cancer, but with that in mind consider the carnivore diet, Many people including cancer patients are reporting it brings them to optimum health in a fairly easy way.
As several of my close family have been afflicted with cancer (everything from lymphoma to colon cancer) I've decided to try and do something drastic before a diagnosis like that, or something like diabetes or heart disease.
I've felt like crap the last several years I think as a direct result of my diet, so here goes lol.