A Neuro-Psychologist does the Neuro-Psych Assessment. They are pricey so a good referral from a PCP is good. A neuro can also refer.

The ringing in the ears is likely with your for life. My ear ring like a bell. Have for decades. I have learned to just ignore it.

The balance issues can be vestibular or vision related or both. Balance depends partially on visual reference so vision needs to be checked by a specialist (behavioral optometrist, https://nora.cc/healthcare-locator.html)

A balance clinic can help with vestibular issues. They are often associated with hearing aid centers as Hearing and Balance Clinics.

Smartphones and tablets have proven to be very helpful so people can use note and calendar apps to help with memory issues. There are apps where you can catalog names and pictures of faces at iTunes and the google app store. Then, you can quiz yourself.

Did you change my screen name to Mark in Hidaho (MIH) ? LOL, Welcome to the world of PCS dyslexia.

FYI, If you use the Post Reply button at the bottom right, it will not repost the previous post as a quote. Adding a double paragraph space every 5 lines or so makes it easier for many of us to follow.

You autoimmune disorder would only enhance your need to learn to lower stress levels. Stress is rough on immune functions. There is probably a forum on Psych Central for your autoimmune disorder if you need information and support.

It sounds like you are taking the right steps. We can help you move forward.

Your diet sounds like a good start but the injured brain needs more than can be achieved by a normal healthy diet. One would have to eat 6 tablespoons of turmeric a day to start to get a useful dose of circumin, the active ingredient. So, many of us try to eat health, avoid the bad stuff (caffeine, MSG, artificial sweeteners, HFCS, and other intense sugars, etc.) and add vitamins and other supplements.

You might benefit from finding a brain injury support group. It can be helpful to meet others with similar struggles in a place where you can talk openly about them. BIA http://biaa.org/ has links to state affiliates and local support groups.

My best to you.