I don't have insomnia; in fact, I suffer from the opposite problem. I have a hard time staying awake especially if I wake up too early in the mornings. When I was in college, I was so sleepy that I bobbed my head up and down and I saw the TAs talking about me. There were also students who made fun of me and used their cellphones to make loud noises at me whenever they think I'm sleeping. It's embarassing, but I just can't help it. For a period of time, I worked and took classes and that was really bad on me; I had a lot of trouble staying awake. I envy people who only need 4-6 hours of sleep a day.