Drifting to sleep sudden jolt/zap feeling. been going on for months. ekg normal, anxiety related ?

This is a common: and normal finding for many individuals. It is not directly related to stress. A hypnagogic jerk is an involuntary muscle spasm that occurs as a person is drifting off to sleep. The phenomenon is so named in reference to the hypnogogic state — the transitional period between wakefulness and sleep. Hypnagogic jerks are also commonly known as hypnic jerks or sleep starts.