One other thing I wanted to say also
@the10thleper319 but I didn't have the energy to write earlier was that I first heard of the concept of an emotional flashback from Pete Walker, which if I remember correctly was like sort of feeling particularly awful, sad or ashamed or (x) out of the blue with no seeming cause, but there is one. Impact is there even if we do not notice or acknowledge it. Especially never thinking of it in those terms or as a possibility or reality. In a similar way I think it requires some mindfulness to notice even how we feel, or how a moment or an overheard comment or whatever affects us.
I also remember maybe 35 years ago saying to my mom I wonder if I have depression- except that I notice it is 'solved' but what I read or hear. Which didn't seem to me as physiological if it could be altered by my thoughts. Same could be said (for me) for anxiety but I believe that is physiological at least partly in my case. It doesn't budge so easily, or rather only with a very few things.