What is up with this body?

Man, I just don't understand it. Am I going to be able to run or not? A week ago I was having some pain in my knee. Even though I was able to complete a couple of short 3-4 miles runs, I still had some pain in my left knee. Now it seems like the entire knee is unstable and I'm having trouble going up and down stairs. Listen to me, complaining about a lousy knee when people in Joplin are losing lives, limbs and loved ones. Big deal, a sore knee! God please bless the people of Joplin as well as those families in Tuscaloosa, Reading, Sedalia, et al. Every day is a true gift!....Mike