Hi Barngirl, I think I know what you’re talking about, and it doesn’t sound remotely like confusional arousal to me either. Doctors - even some sleep specialists - are notoriously ignorant about sleep-related phenomena, even the more common ones.
I’ve had something which I think is similar for the past 50 years. Hallucinations that occur while one is falling asleep are called hypnagogic hallucinations, but they can be down to various causes, and can be very different in type.
Hypnagogic hallucinations of the kind you describe are most commonly associated with sleep paralysis. However, the sleep paralysis phenomenon is a whole syndrome which can include various different symptoms. A syndrome is a collection of symptoms, so any one person won’t necessarily have all the symptoms. Also, sleep paralysis (or any of its related symptoms) is sometimes found in conjunction with narcolepsy, though this isn’t automatic either.
I’ve had sleep paralysis for more than 50 years, and hypnagogic hallucinations have always been among my symptoms. Sleep paralysis and any related symptoms can start at any time in life, but the most usual age of onset is 15-25 years. I don’t know whether that rings a bell with you.
Maybe it would help if I described my own hypnagogic hallucinations, which started at the same time as sleep paralysis, when I was 23. They’re usually auditory (sound) but occasionally visual. However, like any other kind of hallucination, they can affect any of our senses. Just as I’m falling asleep, I’ll hear a loud voice that I can only describe as being “in the mind’s ear”. Sometimes I can identify it as being like my own voice, as heard in recordings, or else my mother’s - but then we had very similar voices. Other times, it doesn’t have any identifiable quality. My voice doesn’t say the apocalyptic stuff that you hear, but alarming enough to make me sit bolt upright or even jump out of bed. Most commonly, it’ll be stuff like: “The house is on fire”; or “There’s a spider in the bed”. (I’m the world’s worst arachnophobe!)
Less often, I get visual hallucinations in the same stage of falling asleep, sometimes associated with sound as well. These are very similar, being “in the mind’s eye”. By this I mean I don’t actually see things on my closed eyelids. The visual ones tend to be scarier, usually consisting of monsters or evil-looking people looming over me. When they are accompanied by sound, it’s always the same thing: “Hurry up and fall asleep, we’re waiting for you”. Guaranteed to jolt anyone awake with a start, particularly in my case, as I also suffer a much worse type of hallucination associated with sleep paralysis. For me, hypnagogic hallucinations always guarantee that I’m going to have at least one particularly nasty attack of sleep paralysis later in the night.
I would reiterate that you don’t have to suffer from sleep paralysis to have hypnagogic hallucinations. However, they can sometimes be caused by the same triggers that set off sleep paralysis attacks. In my case, the main triggers for both are stress or anxiety, and getting too warm in bed. Everyone’s triggers (for both) are different, so it might be worthwhile trying to identify the factors that are more likely to produce these hallucinations. Alcohol or recreational drugs (especially weed, surprisingly) taken too late in the evening are common triggers for some people, as are certain types of food eaten too late. Getting overtired can be a trigger, as can be getting too much sleep. Too much screen use in the last hour before bed can be another trigger. These are only a few examples. It’s really a case of trying to identify your own triggers and then avoiding them as far as possible.
The good news is that sleep paralysis and all its related phenomena decreases as we go through life. Nowadays I only get two or three sleep paralysis episodes per month, and hypnagogic hallucinations much less often than that. I think you’ll find that if you try not to get too anxious about these hallucinations they’ll tail off a bit. Please feel free to ask any other questions you want to.