The main point of my comment was to say that focusing on inhales will not work and will probably make the problem worse (as you have basically said yourself) Focus on exhales, pretty much always. Before speaking, exhale, and your lungs will take care of the rest for you. I know it's hard to believe, but try it and you'll see. Definitely do deep breathing practice \*but not in the moment of speaking!\* The suggestion to "take a deep breath" probably came from SLPs with near zero training in dysfluency. They probably borrowed it from mental health therapists who sadly also have limited understanding of the actual process of fear/panic. As anyone who goes through it knows, taking a full, diaphragmatic deep breath when in the moment is nearly impossible. Your breath will likely be shallow, further increasing your feeling of air-hunger. I'm a preschool teacher with half a class with trauma from being covid babies (children running through a room shrieking, swatting, climbing on tables and throwing themselves to the floor). I teach my kids to take long, slow exhale breaths. They do it and it quickly calms them down. When I started talking ONLY on exhales (while making eye contact, beginning slowly, and enunciating), my blocks quickly started decreasing in intensity and frequency, and they've been basically gone for over a year.