Life,

I agree with the whole of Mark's responses.

I can't see any way such an incident can cause a concussion.

I too have these sudden bursts on anxiety when my head is banged...I always think this is the one I won't recover from.

I sort of catalog these events in my head and use them as benchmark references to remind myself " this level of impact resulted in nothing last time, that will be the same result this time..nothing."

Maybe something like that will work for you.

Bud