Hi Ronigav, Welcome to HealingWell.
Due to the going to sleep and waking aspects of the symptoms you describe, check out this phenomena.
/en.wikipedia.org/wiki/Hypnagogia/en.m.wikipedia.org/wiki/Hypnopompia Hypnogogic are events perceived while falling asleep, Hypnopompic are events that occur while waking.
For a bizarre phenomenon that's benign, but inexplicable, look up "Exploding Head Syndrome".
/en.wikipedia.org/wiki/Exploding_head_syndromeHope this helps in your research.