Tired

Tired at all hours of the day. Tired enough to barely keep my eyes open sometimes. Tired enough to go in and out of a near-sleep state in front of my computer at work, in which my eyes are open but I am not conscious of my surroundings. Tired for no apparent reason. Tired in spite of getting enough sleep. Tired in spite of not being particularly stressed. Tired in spite of not feeling sick in any other way. Mystery tired. Not too worried - it happens occasionally. Hope it goes away.