There are events called sub-concussive impacts. These are jostles of the head that cause very minor trauma to the brain that is not immediately notice but cumulatively can have the same effect as a concussion.

Your refusal to give your brain a rest has left it very susceptible to any form of quick motion.

So, yes, your brain is permanently concussed. Every concussed brain has lasting damage. For some, it does not manifest until the brain is put under stress. For others, it includes a severe sensitivity to any quick motion.

Bending over and then back upright is not a concussion. It is a challenge to the vestibular system.

As I said before, you need help with your anxiety and hypochondria. It is not conducive to brain healing.

My best to you.