I made an optimistic attempt at running and made it 1 minute 53 seconds before I realized I wouldn't be able to tolerate the pain and limped back to my car, wincing. Then I drove to the gym at work and attempted to do my long run there. I'm proud to say I did 2 hours 50 minutes in an empty gym. The last 20 minutes were tough and I started to slow down some. My heart rate slow ed down as well like at the end of a marathon where my legs give out before my lungs. I think it might be due to the resistance of the elliptical creating some muscle fatigue. Average heart rate was 145 bpm, which is a little lower than my usual 148-150 bpm average for a long run, but I'll take it.
My shin is so bad that I've taken to walking backwards downhill. It's hard to imagine how I'll be recovered in 12 days, but since I believe it's a muscle (and not a tendon), I think it's a possibility. I'm planning to elliptical until I can walk without pain.