The doctor said when he stretched he must have gotten a really bad charley horse-like cramp that pinched a nerve. He's still in pain. He also apparently has a ton of scar tissue across his shoulders and neck. That is NOT a surprise to us. He was in a bad car accident when he was younger.
He's sleeping right now. A little earlier I was curled up in bed, too, after puking out my guts in the shower...I feel better, now.