Your neuro is dead on. Up to 80% of concussion symptoms are caused by upper neck injuries. Both of your injuries could have caused upper neck injuries.

I guess the highly touted Denmark health industry has just as much problem helping people with subtle neck injuries and anxiety as the US system.

It sounds like you need to be proactive in looking for help. The subtle neck injuries are not cured by doctors and therapists. They only help the patient reduce the spasms so the patient can practice good posture discipline for months so the cervical ligaments can strengthen and stabilize.

Those behind the ear muscle spasms caused by upper cervical injuries can cause miserable headaches.