[stevesimmons]

If you are 30 now, maybe you just experienced the typical narcolepsy onset pattern in your early 20s.

I have narcolepsy. The daytime drowsiness started when I was 19 and got progressively worse during the later years of my university study. I pretty much abandoned attending class by my 3rd year.

What you describe as 'lucid dreaming' sounds similar to what I used to call my 'party trick': I would sleep soundly through the compulsory PhD seminars or a few years later my MBA classes, then wake up as the speaker asked for questions. Straight away I would ask a relevant and insightful question! People around me would look stunned: "How could you do that? You were asleep!"

So somehow while sleeping, my subconscious mind was still absorbing the talk. When I woke up, I had no idea what the talk was about, but bizarrely I usually knew what question to ask. Even today, 20-25 years later, my MBA and uni friends remark on it.