20 mile again

Since my log-week begins on Monday, I started off with a long run. My goal is to break 70 miles this week.
Last night was an easy run, and I felt good. (Except that I ate something that made my intestines gurgle and I barely made it to the restrooms at mile 4!)
I got 5 hours of sleep Sunday night because I stayed up figuring out a checking account register problem. So I really needed sleep after the 20 miles. I ended up getting about 7 1/2 hours last night.
This morning, my left knee hurts and I'm sore. Hopefully that will all go away when I start running tonight. I need to have at least 30 miles, and preferably 40 miles by Wednesday. Since I have the Greenland 50K Saturday, I don't want to run Thursday or Friday.
Whatever miles are short of 70 after that, I have to slug them out Sunday. That would hurt, but I'll have the consolation that next week is an easy week.