comet,

Welcome to NeuroTalk.

It is not uncommon at all for concussion symptoms to be delayed. There are various thoughts as to why this delay happens but the key point is that you now have symptoms. One specialists has chastised medical professionals that they need to list "possible concussion or head injury' due to head impact so that when these symptoms show up later, a likely cause is in the medical record.

You are still very early in your recovery. A spontaneous improvement may still happen. You may want to get your neck checked out. It sounds like you may have suffered a subtle neck injury from the whiplash that may benefit from treatment.

My best tom you.