You haven't really given us much to go on here. You stated you are having these twitches/jerking going on in your body, correct? How long have you been experiencing these? Where exactly "in your body" do you feel these? Do these happen while you are at rest (laying down, sitting down, etc.,) or when you are up and moving around, walking, working? Or both? What do you do for a living? Were you doing any heavy lifting, moving, picking things up? Reaching high over your head? Were you doing anything different than you usually do before you felt these, either right before, a few hours before, even a day or two before? What, if anything, makes the twitches/jerking feel better? What, if anything makes it worse?
Your answers to these questions would help us to know how to respond. Once we know more, I'm sure you'll get some suggestions as to what, and why, you are experiencing these! Thanks!!