I've had anxiety issues over the years. One day I was feeling a bit anxious and suddenly the idea came over me to just try to shut off my inner voice - completely. I focused on trying to silence it and suddenly, once it was quiet, my nerves completely melted away. It was amazing. For the next few days I tried to continue my "quiet mind" exercises. It got to the point where I began to wonder if something was wrong with me. The silence became deafening. Scared I might've broken something in my mind I gave up quiet mind but it was incredibly effective against my anxiety.
Now I try and be more balanced in how much I talk to myself and how much I let the voice in my head narrate the world.