John, When one uses a pseudonym, one should remember who has that name. LOL. Sounds like a brain fart I would make.

The dizziness when you got up later was anxiety. If you were standing when you got hit, you would be wobbly and reaching for support. If you were sitting, there would be a Woooooh, Why is the world spinning?

No, this was just a bump.

Stop looking for symptoms. When you look for symptoms, they will manifest where there is a physiological cause or not. Looked for symptoms are VERY suspect.