i identify with every word of this post i was trying to explain this exact experience to my therapist 2 days ago and couldnt find the words in the moment lol she tried to say something validating like i think youve been very articulate in describing your experiences but i continue to feel like the shape and the substance of what i want to say vs what actually comes out of my mouth are very different things when trying to examine in what way theyre different i often get distracted from the original topic at hand and then in a panic my mind goes blank this as you say is mostly true when communication is most important like in a presentation an interview or a group conversation for this reason i tend to keep my mouth shut except to interject funny comments