I had no issue flying for years until I went to visit a friend near a smaller airport and had to take an Embraer E-120 commuter jet, which is usually configured

I had no issue flying for years until I went to visit a friend near a smaller airport and had to take an Embraer E-120 commuter jet, which is usually configured for three-abreast seating in coach. The flight there was fine, but falling asleep on the return flight and waking up in the tiny aircraft somehow triggered a panic attack. After several years, I still haven’t completely regained my former lack of flying anxiety, although avoiding smaller aircraft has helped. It’s not really even anxiety about flying itself, but about having another panic attack, and specifically anxiety about triggering it by falling asleep in-flight.