With all of the self initiated things you are doing, what do you hope or expect a specialist to offer?

mTBI and PCS are not a "Doctor fix me." condition. Other than vision and vestibular therapy, you are doing most of what would be expected. I have lived in a similar condition for 18 years.

There was an NT member years ago in the DC area. He found some help but not much.

I'm assuming you were mountain hiking east of the Mississippi. No high altitudes to challenge an injury.