Maybe you need a better exam that does more in-depth checking.
Sounds like some things need to be ruled in or out..
Like possible scoliosis, TMJ, ON, neck strain, neck muscle issues or some other neck issues ??
A very good DO or a expert DC should be able to help you out with a comprehensive check up..
I almost feel like the Docs were

Check head/shoulders , hips , knees from side & front view - level & aligned?
Any sports injuries , accidents hits or falls in the past?
Those things can show up as we age..