Teo,

I have a theory, I'm much more aware of aches and pains post accident.

My theory is they were always there but I don't filter out the common everyday owies that aren't life threatening or life altering such as I did pre accident.

Learn to ignore that which doesn't require immediate attention.

Not a medical person and I don't know if I'm even close to correct but this has been my conclusion to feeling odd things in my body, like you stating you feel your brain is moving.

I hope this makes sense to you.

Bud