xenopsych,

Welcome to NeuroTalk. There is no valid way to tell if you have any damage. My suggestion is that you may have an upper neck injury with some inflammation causing reduced blood flow and other decreased functions. The trauma can also have set off a cascade of anxiety. From what you relate, you don't sound like you suffered a concussion.

At only 2 days post trauma, you are very early in your recovery. I suggest you just take it slow for a few days, maybe ice your upper neck, and avoid stress and stimulation.

Try to sleep/rest with your neck in a straight position rather than tipped forward like many pillows do. It will help any inflammation resolve better.