INSOMNIA

i think it's because of too late sleep at night during the 2 weeks holidays, recently, i sort of got insomnia.. during holidays, i tend to sleep at around 2 to 3am, and wake up almost around noon time later on. During holiday, dont know why i dont find it tiring nor sleepy. so, i just sleep when im sleepy which is already "early" in the morning. maybe everyday doing the same thing at home, which is staying in front of the computer, and no exercise.. thats why i dont get tired or sleepy. but when school reopen, i had difficulty to fall asleep at night even though im physically tired. i can feel the tiredness and yet mentally active. on sunday night i went to bed at 1030pm. i lied on the bed, stuggling to sleep for almost 2 hours. i think i fall manage to fall asleep around 1230. but wake up later on at 330am, which is very bad cos i find it hard to get back to sleep after awaken. and i just woke up around 5 before my alarm clock rang.. sheesh mann.. same thing happened last night. i went to bed at 11. but i think i only manage to sleep at 1am. wake up at 515am, go to school with such condition is really tiring.. luckily i manage to stay awake and paid attention to what teachers are teaching.. lol.. and what thing i did right after school's over? rush back home and sleep! haha.. canot stand it already..