So today I got home from school as normal and I was tired so I decided to take a nap.  I lay down and fell asleep for about 2 hours.  When I woke up I started to get up and then the the muscle in the back of my lower leg cramped badly.  It was so bad that i was unable to move until it stopped.  When it finally did stop, my the muscle was extremely sore.  It's been about 3 hours since it happened and now the muscle is so sore i cant stand on it and it twitches randomly which makes it hurt more, help. D: