Hospital days make it so difficult to stay on track. You get a hall pass from me on this one (and I'm guessing from the rest of the board as well). Hope your Mom is doing well after her surgery.
Suggestion: At the very least, try to remember to carry a water bottle with you. We've been visiting my FIL a lot recently, and I get terribly dehydrated standing around in hospitals, emergency rooms, etc. You might not be able to remember to pack a healthy snack, but at least you can keep hydrated!