Ok so weirdly (not sure if the same but it reminded me of this), if I wiggle my finger on the part of my ear that covers the canal like when you have an itch and can't go inside in public, it frees my speech completely. The sort of underwater sound it makes in my head slightly covers what I'm saying (for me) but it's kind of magical, the fluency is like 100%. Like in the King's Speech with the headphones. I wonder what happens.