I’d say this is step 2. Step 1 is validation. Negative self-talk along the lines of “I shouldn’t be feeling this way/I’m crazy/I’m overreacting” isn’t usually helpful and can increase the physiological response. “I understand that my feelings make sense, that I have suffered trauma in the past and being triggered and my fear response is a valid response given my conditioning,” is the first step. Checking the facts is Step 2.