Reading this article makes me wonder. Whenever I am too stressed, I become very self-conscious and I interpret everyday things and normal nuisances under the umbrella of "See, this is how big of a failure you are, you pathetic loser". Is almost as if there's another voice - not my voice - in my head who tells me this abusive stuff, sitting on the side and being judgemental.
That sounds a lot more like "automatic negative thoughts". I don't think it's considered a form of psychosis, even if arguably it's sort of similar (you're hearing a voice that isn't there telling you things that aren't real).
I use to have this, the book "the power of now" explains how to minimise and remove it.
remember that the internal monologue is not (the whole of) you. I managed to get rid of of my imposter syndrome by getting rid of that constant internal voice
Does this also count as psychosis?