I'm glad I was able to relieve you of some anxiety. I began stuttering when I was 3, and I'm 23 right now. I've suspected that some traumatic moments had caused it, but the fact it turned out to be neurological means it likely had no cause and I was just born with it. Neurological stutters have no cure, but they can be treated. Thinking about your stutter can make it worse in the moment, but it's not going to do permanent damage. In fact, the only times I don't stutter at all, are when my mood is high and when I'm not thinking about what I'm saying - which often occur at the same time. I don't give my subconscious any time to put value on words so I don't stutter. That's why phone calls are hard, names, titles, numbers, and any other proper noun, because there is a lot of subconscious value on those words - they can't be replaced for a synonym. Any amount of anxiety - even something as small as getting a word right, can make you stutter. At least for me! I can only speak from experience, that's why I firstly suggested analyzing your own stutter.