Yes, I have experienced this and you are right, it is extremely scary. Not having any warning was the worst part for me. I had it happen to me once while driving......now THAT was a nightmare! I didn't have it checked out as it passed and I just chalked it up to another sneaky symptom of the Fibro (btw.....I don't drive much now not having a vehicle). I will be interested in what you find out or what others have to say about this.

I read about the symptoms of narcolepsy, and what a lot of people are saying here, except for the sleep apnea, sounds a lot like it. Narcolepsy is very treatable from what I read. I'm glad you're seeing the doctor. Good luck.

I have this problem and yes it is scary! I am working on it but I smoke and drop my cigarettes but awake immediately.

I have fallen asleep just sitting at computer or sitting in a chair. It's called CHRONIC FATIGUE SYNDROME which unfortunately come with Fibromyalgia! I was diagnosed 7 years with it, sleep apnea & anemic. Triple dose, had to give myself B12 injections everyday, lost 60lbs & got rid of 2 culprits! CFS is not going to go away unless they find a cure! Hope this helps you.

I thought narcolepsy also because I was the same way. They did all kinds of tests. No results. Now I'm opposite and barely sleep. Hope you find out what it is because I remember the fear if not knowing when it's happen and I has a little one to take care of. Best wishes