Your mind is conditioned to get ready for the extreme 'bad' when you set a boundary, so facing it is about re-conditioned the mind to a healthier reality.
I agree with this ^
I don't really think that healthier behavior "caused flashbacks" so much as increased exposure to people, places and situations did. Healthier behavior I think, caused my distorted core beliefs about "what I deserved" or "whether I was worthy or entitled to be treated with dignity or a certain way". I get confused or muffled up still, after an event or situation but I tend to chalk it up now more to my increased exposure as opposed to leading an isolated agoraphobic type life.
This makes sense to me also. When my negative core beliefs about myself crop up, they especially do so when relating to other people. It is as if the healthier behavior, feelings that I am working towards having and the old beliefs, thoughts, emotions and behavior crash together. It causes cognitive dissonance which feels like an emotional flashback.
I don't know whether your "flashback" feels primarily emotional or whether sensory (visual, auditory, or physical sensation, etc) occur. With me, the sensory parts of the "flashback" aren't there - just the emotional feeling and a crash like mental confusion . . . What should I do? Would it be appropriate for me to _____ because of how this person or people are treating me?
It happened to me just tonight! I was at the pharmacy counter picking up my meds. So customers have a sense of privacy, there are three signs that point and instruct people where to stand while they wait their turn that's about twenty feet away from the counter/cashier. A middle aged woman and her daughter came and stood about four feet behind me and began arguing loudly. I turned and looked at them, internally hoping that by my turning around they could read my mind which was saying "Don't stand so close behind me and stop arguing. Stop being so loud." They didn't "hear" me :confused: A few minutes later I turned again and gave them "the eye" - surely they'd read my body language, right? They didn't. . . . Third time I turned:
Me: "Can I help you with something?"
They: "No, we're just waiting our turn."
Me: "Well, you're standing very close."
They: "Yes, we're standing behind you waiting our turn."
Me: "Where you are standing makes me feel uncomfortable."
They: "Sheesh! We're just standing here behind you minding our own business waiting for you to be done."
Me: "You're standing to close to me; you're loud and you're disturbing me. Please move. The line for waiting for your turn (pointing) is over there." - They move half-way to the area where a line had formed while grumbling about it.
Man at the front of the line: "Excuse me, there's a waiting line." Waves his hand to the back of it, three people behind him."
They: "Well, we didn't see you. We were standing over there and we're next."
Pharmacist: "Mam, the waiting line is so folks at the counter can have privacy and you walked in, stood behind this woman, after the people in line were there. You'll need to go to the end of the line or come back later. [The mother had a hissy fit - how unfair!]
Anyhoo, during the bold part above I started shaking inside and began feeling so many of the fear emotions that I used to feel when my abuser talked loudly and argumentatively when he usually stood behind me or followed me and displayed his nastiness. It's taken me a couple of hours to calm myself. But speaking up was a good experience for me, in that doing so was (finally) effective with a bit of help from the pharmacist). And I know speaking up, going through that experience, has helped lay down stronger, healthier self-behavior towards myself.
I'm not sure whether what I described is akin to what you're experiencing. I hope it's a little helpful though.