You’re in a negative spiral. You only stutter because you know that you always stutter when you order food. If you know you’re gonna stutter then you will undoubtedly stutter. The only way to get out of it is to be mindful of the fact that it is only a negative spiral and not something specifically attached to ordering food. It just happens to be ordering food. Then you need to order food. You’ll stutter less and less every time until the spiral is broken and you won’t worry about it anymore.