Ahhh...insomnia

Generally I sleep well. I'm the girl on the airplane who is drooling before takeoff and stays that way till landing. 99% of the time, I'm asleep within 5 minutes of my head hitting the pillow, but when insomnia hits, I'm up all night. It's just past 3am now, and I've been trying to get to sleep for the past 5 hours.....