Do you mean PCS, Post Concussion Syndrome ? I don't know what PCT is. Or is the PCT reference just a brain fart common to PCS ?

I would connect your symptoms to your physical activity more than to the airline flight. The altitude (8000 feet) issue would resolve within a hour or two. Fatigue from travel can last a bit longer.

PCS is a strange animal. There is often now way to connect symptoms to a cause, especially later in recovery. That later roller coaster ride can be frustrating. Try to not let it get you anxious or frustrated. That only makes it worse.

My best to you.