occipital neuralgia-easy 30 seconds of fingertip testing sensitivity of areas around the vertabrate of your neck. (I did not know of mine until a neuro actually tested me for it...appx. 21 months after my injury.

search: occipital nerve...and see if any of your symptoms make more sense.

Test to see if your elevated heart rate causing symptoms is the real catalyst or not. Wall squat wearing a hr monitor, then maybe do stationary squats. see if a similiar outcome with similiar heart rates. It took me over a year before hr started to not be as much as a catalyst as it once was. I had diffficulty trying to get above 115 bpm for the first 9 months. some things just take time.

As time passes, if you find yourself having issue with impact vibrations, you may now also suffer from a condition called Intracranial hypotension.

Around our brains we have a fluid called cerebrospinal fluid that works like a cushion for our brains. Sometimes if a person hurts his neck, back or cranium he/she can get a tear in the dura (sack) that contains this cerebrospinal fluid and it can start to leak. This will cause less volume of fluid around his/her brain and lower than normal pressure inside the cranium. This in turn will make the brain more sensitive to vibrations or impacts.

You can check if you are suffering from intracranial hypotension by holding your breath and increase your abdominal pressure (this increases your intracranial pressure momentarily), while you drive over a bump. If this maneuver helps you take the bump, then you know that you are suffering from too low intracranial pressure.

and do not give up. I am 28 months since my injury...and still a long ways to go.

You typically diagnose this with a MRI with contrast of your skull.
It is treatable, but it will typically not go away without treatment.