I couldn't quote your whole post. But I could relate to all of it in certain ways. Most people here probably know that my history involves a lot of trauma. For me, trauma began in the womb, and to this day, I live under threat of periodic physical accessing and retaliation by the cult. (In fact, I am awaiting my 2nd chiropractor visit in less than a week because of a recent incident and severe pain ...ribs, spine, hips, shoulders, pulled muscles, etc.) Needless to say, I have to be aware of my surroundings 24/7. I don't appear uptight or on edge to others. My interactions are normal and calm. But I stay alert.
My adrenals were shot a long time ago, and hopefully, that is improving through nutrition and diet, and much prayer.
I have had times when too much talking (people around me) was overstimulating. Inside, I had to double task ...listen, while telling myself it's okay, this is important, I'll get through this, etc. I didn't want to remove myself from the conversation because this was my sweet teenage daughter talk, talk, talking away. (Lol) I stayed, I participated, and I survived it. (Lol) And that has happened on occasion in other situations. It helps when I know what's happening and why. If I pray and know I'll be okay .....it goes better. But if someone is snappy, I've learned to just walk away, remove myself from their presence ....pray and focus on something productive and positive with the Lord. In the past, I might take on what others put on me with their snappiness or bad moods ....take the guilt, etc. But that isn't realistic, nor the right thing yo do. It isn't mine.
Right now, I am working through some things with the Lord that He is putting His finger on. When someone is hurting, sick, etc ....I am prone to take responsibility upon myself to make them better/okay ....to make sure they don't die, etc. This is something that was exploited through many setups throughout my childhood when someone was hurt and it was "my fault." Or someone I loved was hurt and I was responsible for making sure they didn't die. This happened when I was age 4 ...I remember my mother being hurt, incoherent, and I'm sitting with her head in my lap, making sure she doesn't die. (Literally, these scenarios happen over and over in SRA/MK.) They love to exploit anything that is a God-given attribute.
Anyway ....that was probably too much. But all that to say .....I relate to what you wrote.