Thank you for posting your query.
I agree your problem is complex, and you have not received a proper diagnosis and treatment till now. Constant and chronic pain
over a long period of time adversely affects the quality of life as well as occupation.
In my opinion, your pain is of neuropathic (nerve-related) origin and you should consult a neurologist
. A problem with teeth or sinus
would not lead to these kinds of pain for such a long duration.
MRI of the brain should be done to exclude any underlying reason for the pain.
Medications that are likely to help you are pregabalin
I hope it helps.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad