I always sleep at 10 PM, except when there's an official contest next day I spend more than 3 hours trying to sleep while awake in bed. Tomorrow I have an official contest and I'm facing the same problem. To prevent this from happening I intentionally slept only 3 hours last night to be tired enough to sleep today, and I was very tired and sleepy all day because of that, and now it's almost 12 PM and I can't sleep. Does this usually happen to you? Do you have any suggestions on how to prevent it?