This has been my first and I hope only concussion. When the nurse told me that it will get worse before it gets better, I didn't really believe her since I already felt better than the day of the accident. However, I'm a believer now. Four days after the accident, whenever the Advil I was taking for the neck and later back pains wore off, I would start getting nauseated again. I would take another dose of Advil which would make the nauseating feelings go away. Meanwhile the neck pain transferred down to my lower spine and then back up again. Here it is five days after the accident and my neck aches more than it ever has to the point where Advil is hardly doing anything for it. It makes it hard to do anything when your mind is preoccupied with the pain.
Probably what worries me more than anything is that after the initial impact which I "remember" as only minor at best, I remember backing away from the car and driving slowly across the very busy intersection to a nearby shoulder. I have no gaps in my memory that I am aware. What troubles me is that I have no recollection of checking or even looking what the traffic around me was doing as I drove from the collision site to the shoulder. Perhaps it was the shock of being hit or what I am suspecting is that the collision was actually more violent than what my mind remembers and hence the very sore and painful muscles five days later.
My next project, which I was getting supplies for when the accident occurred, has been pushed off for the time being which makes my wife frustrated. She really doesn't understand the scope of effort that goes into completing some projects, only what it looks like when finished. I on the other hand, know that my neck and back won't allow me to do the initial prep work involved to do the project successfully so I'm trying to concentrate on healing. I will get to it eventually and she will be happy when she sees the end results and for me, that is all that matters.
(Edited to add that as of today, I'm about 95% back to normal.)