Insomnia Sleep Disorders

Since the last day of school (May 29, 2008) ive been stayn up every night. I usually go to bed between 2:00AM-4:00AM and i cant never sleep. when its late at night i get very bad headaches and my body always feel like if its weak or i cant walk . when im tired i cant go to sleep
CAN SOMEONE TELL ME IF I DO HAVE INSOMNIA OR WHATS WRONG WITH ME LIKE IF I HAVE TOO MUCH STRESS, ANGER MANAGEMENT, ETC.
Why does my head hurt all the time when i stay up.
NO RUDE COMMETS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! YOU WOULD’ENT LIKE IT IF SOMEONE MADE A RUDE COMMET ABOUT YOUR QUESTION
I am 12 years old