Hi
What you describe sounds like it could be a central apnea event. I've had this for decades, and it started after I was hit by a car with severe concussion and subdural hematoma at age 15. I would wake up unable to move, hallucinating wildly, and terrified. What happens is that your blood oxygen desaturates to the point that something in the brain stem kicks in and causes you to "reboot" and breathe again. You might want to consider asking your doctor about a sleep study....

hope this helps

gershonb