I have been having some trouble staying awake at work, for some reason, I feel very sleepy at around ~1-4 PM (the time I feel sleepy varies at those times). I try to stay awake by drinking coffee, but it doesn't really help. When I want to sleep, I literally have to close my eyes, otherwise, it gets really hard to concentrate on my work. I exercise regularly and I sleep at 11 PM and wake up at 7:30-8:00 AM everyday. Do you think I have narcolepsy?