Afraid of Screaming on Flight

Hi! This is from a passenger point of view. I haven't found a single post on the internet of this question!

Occasionally/rarely in my sleep I will scream/wail. It's night terrors. I think it will be because I will be physically uncomfortable because sometimes or have anxiety. After I scream I wake up.

I have also screamed while awake when I wake up and someone has entered the room in the middle of my sleep.

With this being said I am afraid it will happen during on a flight. I think it will be less likely because I will not be laying down and won't get into an uncomfortable laying position.

What should I do? I am afraid of being placed on a no fly list! It will be too hard to NOT sleep on a long international flight.