That was really good advice The Smoking Monkey gave you.

I'll add one more:
8. Give yourself a break. You're recovering from cancer, chemotherapy and, unless it hasn't yet occurred, major surgery. Your body is trying hard to recover, marshal its resources and regain its strength. It's understandable that you're both tired and depressed. Learning you have cancer at such a young age is a huge blow. Your head is still adjusting to that fact, just like your body is. Get the rest you need and take care of yourself!