Narcolepsy occurs when your brain fails to control your ability to sleep or stay awake. If you have narcolepsy, you may experience uncontrollable bouts of falling asleep during the daytime, even after a good night’s rest. So basically, you may unwillingly fall asleep even if you are in the middle of an activity like talking, eating, or even driving. You may also experience other symptoms like sudden muscle weakness while awake, hypnopompic hallucinations, and total paralysis.