Taliesin,

Welcome to NeuroTalk.

You comment about less dizziness when you are not moving makes me wonder about a vestibular issue. A vestibular assessment would be worthwhile. The Epley Maneuver may be helpful.

With the symptoms you are manifesting, there does not sound like a need for a CT Scan. They are 200 time the radiation of a normal x-ray and rarely show anything unless there are more severe symptoms, extreme headache, slurring speech, motor control issues.

Your jaw issues suggests some whiplash injury possibility causing muscle spasms in your neck. A fall like yours could cause such an injury.

Is there a concussion clinic in your area ? They would be better than an ER for help with your struggles.