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Insomnia could be related to psychological trauma of being in an auto accident. Counseling may help. Also if your doctor prescribes a light sleeping tablet, it may help. However please do not take any unless traumatic brain injury is ruled out. Since you are also having ear pain, you must get this evaluated. If this is due to pressure difference in the ear canal or Eustachian tube it will go by doing the valsalva method. However first consult a doctor and an ENT specialist.
It is difficult to comment beyond this at this stage. Please let me know if there is any thing else and do keep me posted. Take care!
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