You dont even have slight hallucinations while falling to sleep, just like in the linked article? My first sign is I usually start hearing voices which I almost always know are not real.
And just to be clear, I didn't mean that I fall asleep as soon I close my eyes. It's just that there is no "transition" between being conscious and sleeping. And then, suddenly, I'm awake.
I have that idea that my mind suppresses the memories of dreaming and falling asleep, because when I was a kid I had two recurring nightmares that I dreamed of almost every night. Still, never did proper research on this topic.
edit: typo