Pain....

I have mysteriously pulled some muscle or pinched a nerve.  It is extremely frustrating!  I could not hardly walk without pain shooting down my leg for the first couple of days.  By the third day, I was starting to feel better so I decided (not a very smart decision in hindsight) that I should go ahead and try spin class.  By the next day I was in extreme pain and have been unable to complete any type of physical activity.  I am trying to wait, but really want to run today.  I have a feeling if the pain starts to feel better this afternoon I will try running.