I felt very sad when I read how you are feeling. Let''s face it this whole cancer thing is the pits and chemo makes you feel like crap most of the time. Especially when you seem to get the side effects that no one else gets. But it is better than the alternative and with two to go there is almost a light at the end of that tunnel. Trust me the surgery is easier.
I hope things go as well as they can this time and don't worry about the house, a wise surgeon once said to me that no one died from a messy house. She was right but I do understand how you feel. Try not to feel disappointed in yourself, you can share as little or as much as you like about yourself on this forum and there are lots of people who want to help.
Keep in touch.
Kay