I have been experiencing jerking movements and need some info. The movements are not the muscle twitches where you can see a muscle twitting under your skin. It is not the jerks you feel as you fall asleep ethier. The best way I can describe it is you body jumping or jerking. It usally happens when I am feeling at my worst. I feel it when I am fully awake. My entire shoulder will contract lifting it off the bed or couch. I have even done sit-ups with stomach contractions. I will get a few within a couple of minutes. Then they stop and will come back later. They don't hurt but they are a little frightening. They are more bothersome than anything else. Does anyone have these?