Is it a sleep disorder?

Do you…
  1. feel irritable or sleepy during the day?
  2. have difficulty staying awake when sitting still, watching television or reading?
  3. fall asleep or feel very tired while driving?
  4. have difficulty concentrating?
  5. often get told by others that you look tired?
  6. react slowly?
  7. have trouble controlling your emotions?
  8. feel like you have to take a nap almost every day?
  9. require caffeinated beverages to keep yourself going?