(((((MUE))))))

What you describe about the door sounds like a PTSD response.
I have that as well and physically can't handle doorways blocked that way.
I talked with my T about it and he is the same way due to his PTSD.
He told me it was very normal for people with PTSD to have the door issue.
And it is fair for us to do what we need to do to stay safe internally.

I do like how you are trying to work through it though. Way cool.
Maybe the others in the group don't realize how strong the sensations are inside of you when you are in a situation with the exit being blocked?
I suspect that unless someone has PTSD, they can logically understand what your response may be, but they don't have a clue as to the level of panic inside our bodies and minds that accompanies the situation.

You may want to research on line and find a good link to share with the group that shows what you are feeling?