Hello and thanks for using HCM.
I have read your question and understand your concerns.
In my opinion, first there is need to diagnose correctly the kind and the degree of the damaged area of your neck and imaging studies are necessary to evaluate conditions such
fracture, slipped vertebrae ( spondylolysthesis ),
herniated disc disease, since there is trauma history.
Cervical spine x-rays in neutral, flexed and extended position,
MRI also are needed for this purpose.
In mean time, use of a soft neck brace when you work out, travel or stand up for too long can help prevent further deterioration and can improve your symptoms.
Discuss with your
primary care Doctor about having done these examinations.
Definite treatment ways should be clear after imaging studies.
Hope you found the answer helpful.
Take care.