This is not hypnic jerks as I do not physically move and whatever it is I have had for over 10 years on and off so its not immediately life threatening!
Within 10 mins of getting into bed and laying down as I start to relax to sleep I get evil split second sensation as if my whole body has suddenly dropped or moved although it hasn't moved even an inch and its accompanied by a whole body tingling sensation. On a good night I get it once or twice and fall asleep but I go through phases where it keeps going almost all night long and I cannot sleep.
I have been told it could be due to anxiety, or its from my damaged neck and misfiring nerves and have just had a ct scan of my inner ears to rule out a rare ear disorder and am waiting for results.
I know its a long shot but does anyone else with anxiety get this very strange symptom?