I would agree with PeteZa on this, CN - find a way to get some help in there!! Call on any friends or family that you can actually count on to show up (sorry, big problem for some), or hire someone if needed to come in for at least a few days that week.
Personally, although a very hard choice, I think you made the right choice to stay home and do what you can to help your body right now. Heal now, and there's a chance at another trip later.