y do i feel sick from not sleeping? insomnia

ive had insomnia for 3 years gradually getting worse... i was going 2 school (A grade student) however got so bad i couldnt even write an essay i had 2 quit during year 12... now even going so bad as 40 hrs no sleep- i dont sleep now untill my body passes out-  HOWEVER--- ive been feeling sick sort of like a mild hangover when i dont sleep now. i feel dizzy headachy when i get up and move, i pretty much just stay in bed now... its freaking me out because nowhere anywhere does it say that insomnia causes that... why????

please help me its ruining my life!

[DrNavneetMD]

Hello Dear,
The causes for insomnia include anxiety, stress, and depression.Insomnia may be an indicator of depression.You should try to find the cause , if the reason is evaluated the treatment  becomes easy.
Common stimulants associated with poor sleep include caffeine and nicotine. You should consider not only restricting caffeine use in the hours immediately before bedtime but also limiting your total daily intake.Headache and dizziness are bound to happen if the sleep pattern is disturbed.
Exercise regularly..Aerobic exercise and general fitness are important to maintaining good health.You should exercise in the early part of the day and avoid strenuous activity before before bedtime.  Avoid large meals and excessive fluids before bedtime.Light, noise, and elevated room temperature can disrupt sleep.
  Because insomnia may be a symptom of depression, anxiety, or another mental health issue, a mental status examination, mental health history, and basic mental evaluations may be part of your initial assessment.You should consult a neurologist and get yourself evaluated.
Refer http://www.emedicinehealth.com/insomnia/page6_em.htm
Best