Myoclonus is a
rapidRapid shallow breathing jerk of a body part which is abrupt and irregular
Proprioceptive
myoclonusRestless leg syndrome is a more
generalizedGeneralized anxiety disorder axial (the midline) jerk that results from an irritative lesion in the spinal cord
However, by your description, it is impossible to tell if this is the case. If you are concerned you should make an appointment with a neurologists in your area
Good luck