Setbacks are not harmful.

But, they teach us lessons. Your lesson is to avoid loud environments. This may be a trigger that you struggle with for a long time. For some of us, we never get to a point where we can tolerate loud chaotic sounds.

A simple explanation, "I'm sorry. I cannot be in this noise and bumping." and leaving quickly. For me, I can tell when I am exhausting my short tolerance for the loud and chaos. My wife can read it on my face. If we are in a loud restaurant reading menus, she will look at my face and see my struggle to focus on the menu and suggest we leave.