i get really tired in the day, but when i come to go to bed at night i can't sleep, and when i finally drift off i am awake again within an hour. i normally get into bed around 10pm and only have to be up at the earliest 7am, which should give me 9 hours worth of sleep. i have become more quiet lately, and have started concetrating on my college work alot more. i have also changed my diet. most of my personality has changed and since the 1st aniversary of my nan's death (god bless her, and rest her soul) i have become a lot quiter. any help as to what could be causing my lack of sleep?