I always have a habit of sleeping late right from my schooling days. I find it very difficult to sleep at least till 3-4 pm and then even after sleeping I don't sleep quickly there are always some thought on my mind even though I don't want to think about them and sleep. So I actually have a good sleep in the morning till 10 after that everyone disturbs so I get by 10: 30. Throughout the day I feel lethargic and unable to study continuously I always have to take breaks frequently. I was not worried about all this until graduation as I was very much social those days do I had a habit of late night party. But now my social interaction Is very less so little worried. I do one hour of gym alternate days to keep myself fit. Is everything normal or is there anything that needs change. If yes then how and what should be done?