Wow. I don't think I've noticed myself stutter once by myself, unless on purpose to mock myself. Maybe I have stuttered by myself and just haven't picked up on it. It's mind boggling how the brain works and we all have the same issue but for different reasons and slightly altered experiences too You can pause in a conversation for a second or two, no ones going to care too much, even if you use "filler words" such as "uhm... er... uuhh" and so on