I'll add that I have always had a voice in my mind who is more like a big brother/sister to me. I talk to myself all the time. When I'm in a bad space, I forget that voice or lose it, for long periods of time. When I'm in a good space, I talk to myself in a supportive way. I can rely on this voice talk me down from my anxieties, to stop the negative rumination and redirect my thoughts.

I didn't realize, until I was in therapy, that this is basically a version of "supporting the inner child" and it's a skill I developed because of the lack of strong emotional support in my childhood.