It's not so much insomnia that I go through every once in a while, but more like a sleepless night due to constant activity and work being done or halfway there. Like tonight (today) I have been working on a project and am just now getting ready for bed. I do not know much about insomnia except the fact of someone just cannot sleep, but I don't know if it is insomnia if their reason for staying awake is because they are preoccupied or just can't lie in bed and sleep without doing a thing. Does anyone know the difference? If they both are considered insomnia? Maybe just not being able to sleep without busying yourself?