tips for a cognitive stutter?

tips for a cognitive stutter? Hello im 15 and I used to go to a speech therapist, it didn't help at all but she did say it's cognitive. In my room I can say all these words I struggle on mostly fine buy In public I can't anymore. Whenever I try to just say it I quickly change the word and then when no one is paying attention to me anymore I can suddenly just say it. Any tips for this kind of stutter?