If your experience is anything like mine, you'll be in too much pain and/or too stoned on meds to care about anything. You may also resemble a chipmunk and not feel like leaving the house. If you do feel like eating, protein shakes are one good possibility. Throw in some ice cream and peanut butter for the calories. Anything you put in a blender you can eat, so get creative.
And remember that in the grand scheme of things, a week is nothing. Let yourself recover and don't worry about it.