I'm 18 for bad luck I should rejeced College because of my Stutter problem lol but I'm try to go a therapist and is not late to improve our stuttering, and you don't give up, I know that sometimes u have anxiety from stuttering or something else, but is okay u can improve ur stuttering u can go to another therapist they will help you maybe those therapists you have been are not adapted, I wish u all the best and don't give up!❤