You do not need to feel very symptomatic for your upper neck to be a problem. Touch behind your ears. Do you feel any tender spots ? These are often muscle spasms due to upper neck injuries and inflammation. You may sense some clicking and other noises as you move your head around.

Most neuros don't have much to offer for concussions. Other than vestibular and vision issues, there is not much that can be done for concussions other than quiet rest. This means limiting visual and auditory stimulation. Simple activities with minimal cognitive effort are best. Just enough cognitive effort to keep blood flowing through the brain.