I’ve recently gained the mentality where I can brush off stress and negative thoughts such as being too hot in work or having sore legs. I kind of think of it as having a internal coach in my head. It helps me keep moving and not dwelling. I’ve also got friends who help me laugh about my stutter. They basically abuse me and take the piss out of me but it’s really helped me not get offended at comments made about my stutter. This probably isn’t for everyone though I wouldn’t say I’m confident but using these tools has definitely helped me stop getting my head about my stutter. I’ve recently been making a lot more phone calls (I hate phone calls to strangers) and I bought a car without any help, which obviously involved a bit of speaking. Yes, I still stuttered and sometimes it was bad but I’ve not sat and been down about it. Hope some of this might help you!