This was really good.

You described a strange phenomen that apparently is known as a "Waking Nighmare.

"A waking nightmare: The enigma of sleep paralysis. ... It may sound like a horror movie scene, but this is the real deal & you're experiencing sleep paralysis. Sleep paralysis is like a waking nightmare, and the underlying causes for this condition remain unclear."

I have experienced this twice in my lifetime. It was horrible.

Fantastic job of storytelling, in my humble opinion.