When an old belief fires and brings a wave of emotion with it, your body does not just feel that emotion and calmly decide what to do next. Your nervous system gets involved, and it takes over. This is not something you are choosing. It is automatic, and it is fast. Your body has decided, based on the old belief, that something needs to happen right now to keep you safe.
Fight
A surge of energy toward confronting or controlling the situation. Can look like snapping, arguing, or needing to fix things immediately.
Flight
A pull toward escaping the situation. Can look like leaving the room, changing the subject, or filling your time with busyness.
Freeze
A sense of shutting down or going still. Can look like blanking out, going quiet, or feeling unable to think or speak at all.
Fawn
A pull toward smoothing things over, agreeing, or appeasing, even when part of you disagrees. Can look like apologising for something that was not your fault.
Most people move through all four of these at different times, not just one. None of them are wrong or broken. They are all forms of your body trying to protect you, using strategies that likely once worked, in an environment where they were genuinely needed.
This is why simply telling yourself to calm down, or to react differently, so often does not work in the moment. By the time you notice what you are feeling, your nervous system has often already started moving. You are not failing at self control. You are working against a very fast, very old survival system that switched on before your thinking mind had a chance to catch up.