There are many specializations of CBT. Classic CBT for example is counter productive, but CBT specialized exposure response prevention tackles the response and perspective of our stutter anticipation (trigger). In CBT-ERP it's about making the trigger unimportant and disconfirming expectancy. Don't go to a psychologist if you don't know what it is. You can find many free books about ERP and even youtube has a lot of playlists with complete courses