Insomnia Support Group
Insomnia is a symptom, rather than a disease, and is characterized by inadequate quantity or quality of sleep. People with insomnia complain of difficulty falling or staying asleep, which results in significant impairment of daytime functioning. Insomnia is categorized as transient (shorter than one week), short-term (one to three weeks) or chronic (longer than three...
My suggestion would be to start with your sleep-wake schedule. Only allow the minimum time in bed that you need, no more. Do not allow yourself to sleep in, and avoid napping -- which only steals sleep from the following night.
Upon awakening, expose yourself to bright light immediately. Be sure to avoid any caffeinated products after about mid-day. Continue with your normal lifestyle of study and exercise, and don't let this insomnia thing get in the way of anything you'd normally do.
Chances are you're getting more sleep than you think you are. It's likely you are dozing for some of the time you perceive yourself to be awake, a very common phenomenon known as sleep state misperception.
Managing stress and anxiety can also play a role. If you want a complete and comprehensive drug free solution, check out CBT sleep training methods for adults. This is typically what docs recommend before drugs. Much good info online if you're the self-help type.