Going the farthest distance for the first time

Tomorrow morning I am heading into uncharted territory-a distance over 13 miles and I am more than a little nervous about. My diet is not going well, can't seem to stop my cravings, so I am not getting on the scale again for a while-ignorance is bliss. I had to get on the treadmill Tuesday and that was a mistake. I did something to my knee and today is the first day it didn't bother me. I only did 8 miles this week.