To put it simply, we don't know enough about stutter yet. But we do tend to know at least some things already, in terms of what is and isn't true, and what does and doesn't work. - What you describe seems to be putting the cause of stutter entirely on you. This is not fruitful. It's not you who is to blame for anything - it's just that you have a stutter, and that means there are difficulties associated with speaking in various contexts. - The way we deal with a stutter is that we get better at managing it. This isn't about removing or curing - it's about finding the improvement in performance and control that can be had. For this, speech therapy is a valuable tool. It doesn't appear to me that you've visited this route at all so far. - But yes, the mindset is also part of dealing with stutter. This is not something that speech therapy is designed for, though. Having succes with the process is likely to change the mindset on its own, but some might require more than that. The important thing in this regard is that we don't understand ourselves in counterproductive ways. - Other than that, of course, if there are distinct diagnostical factors that might influence your stutter, those are to be addressed on their own, and we can't comment on that.