@Seren, you feel tired because you are sleeping a little too much now. The max amount of sleep you shoudl get a night is 6 to 8 hours, which is still a bit much. 5-6 hours is the best amount of time that an adult should be sleeping. Of course this is different for children or teenagers. But the human body can function off 3 hours of sleep a night. You only sleep to recharge your brain and if you sleep less you get into REM quicker.