Ben, We all agree that inflammation is a big contributor to concussion symptoms. It is not the only cause. The web article you pointed to just says that but does not offer treatment suggestions.

As you said, you spend a lot of time focused on your concussion symptoms and concussion issues like worry about a passionate kiss or hug or bumps on the metro. If the bumpy part of the metro is only 90 seconds, stand up with your knees flexed and let your body absorb those bumps.

I don't think you should be doing weight training. It may seem safe but it causes neck muscle tension that can be a problem.

An issue you have failed to understand is quite simple. Your recovery is not based on the amount of time you spend resting. It is more impacted by the most stressful things you do. Just as you say that only 90 seconds of the metro ride are a problem, spending a small part of your day wrapped up in anxiety will prevent the rest from having any value. It is like you keep picking a scab off just as a wound starts to heal.

You have not developed brain damage since the neuro appointment 5 months ago. Also, top neuro or top psychiatrist is completely meaningless unless they have expertise with your condition (most top neuros don't) or you are willing to believe them.