Do you think that your stuttering is all in your mind?

Do you think that your stuttering is all in your mind? Do you think that your stuttering is all in your mind? Does it have something to do with your brain? Did it appear because of trauma? Maybe you inherited it. Tell me what you think. My family told me after my Mother gave birth to my brother, she stayed in the hospital a very long time. I was 3 years old. I started stuttering at that time. That’s over 50 years ago. I don’t know if that is the case or not. Tell me your thoughts.