Randy, sorry to hear about the bad luck.
I wouldn't worry about this situation too much, though. As you know from your running experience, nothing you do between now and race day will improve your fitness on race day. You're going to be relying on the months and years of consistent training going into these final two weeks. Do what you have to in order to get to get to the start line healthy. Once you start running on race day, you have the experience to adjust as necessary. The one thing to keep in mind, your fitness will be fine.
Personally, I don't think I'd even adjust my goals pre-race. I'd go into the race with the same goals but maybe just a bit more cautious approach early on, then see where things were taking me.