Adenium,

It sounds like your head and neck have experienced quite a trauma. The twist and jarring can create a complex injury. The upper neck can often contribute to many symptoms, especially head aches. Most chiros use the 'twist the head and pop the neck' treatment. This can be far too aggressive for the types of neck injuries that cause these symptoms. An upper cervical chiro may be worthwhile.

A physical therapist who has good upper neck skills can often help with gentle traction with some gentle manual mobilization of the upper neck. Range of motion exercise can be premature.

Clear x-rays, CT Scans and MRI's of the neck do not mean you do not have a subtle upper neck injury.

It is important to use good posture discipline while the neck heals. Good sleeping and resting posture is very important.

There is some good information about these injuries and attorneys at Brain Injuries Help: Crashing of the Mind After Traumatic Brain Injury and Subtle Brain Injury Permanency from Concussion

A physiatrist (Physical Medicine and Rehabilitation MD) may be better than seeing a neurologist. It is worth scheduling the neuro psych because if you are still struggling in 4 months, a neuro psych assessment will be very useful.

Please don't lose heart. Many have gone through similar injuries and slow recoveries. It often takes time and finding the right therapy combinations to see improvements.

My best to you.