If you mean: You can predict that you will stutter and after you actually start speaking you will stutter on that exact word, I guess that is common. At least it happens to me all the time. If you mean, you can't think to yourself, then I guess I have that too but I'm not sure if that's what you are referring to. For example I am thinking and suddenly I am incapable of continuing my thoughts. Like my brain stops working on a few words. I guess it's a different feeling from actually stuttering tho. One thing I have noticed with myself is that I am always thinking about others. Like I'm always in the presence of others and imagine how "others" would react or w/e. So maybe that's the reason for that. But at the same time I don't really know if you also think this way or if it is at all common Sorry for bad English 😁