Has your team mentioned any upper cervical chiropractic at all, even if just for an assessment?
This link explains it well -
The following Signs and Symptoms may indicate Upper Cervical (c0-c1-c2) Injury
C0 – skull or occiput; C1 – atlas; C2 - axis-
Up C Spine - A New Approach - Sign / Symptom Checklist
Home page- Up C Spine

Many videos on you tube , it is not the same as standard chiropractic adjusting, if that is a concern for you..It is a very light gentle adjusting no force at all is felt..