I've had psychogenic stuttering due to PTSD for 30 years and I've done EMDR for 3 years. Anxiety did go down significantly (and so did depression), but it did almost nothing to my stuttering. I had some "good days" in terms of fluency after taking ashwagandha and diazepam (but I do NOT recommend them long term, specially diazepam, consult with your doctor) , so I don't think EMDR affects stuttering itself but rather how calm/confident you feel in a given situation and how "integrated" your traumatic experiences are. It is that calmness/confidence that can affect your stuttering positively, but it will NOT cure it. I think this "integration" is fluent and can come and go every once in a while (can get worse with stress, improve with healthy habits, etc). I do recommend EMDR to everyone with traumatic experiences as it can dramatically improve your life (you will feel calmer overall, less prone to sudden anxiety bouts and feelings of sadness/fear/threat) ", but your stuttering is not going to go away. It might help though.