Yes, I have had this problem. Back in high school, I used to practically whisper just about everything I said, except for when I was talking about one of my special interests, at which point my voice would go out of control and I was told that I yelled at people. My friends were always telling me to speak up, while when I would talk about my special interests to the teacher who was on duty at the library during lunch, I was often told to lower my voice because probably everybody in the room could hear me and it was very disruptive. I believe that I have, for the most part, gotten over this problem by now, in large part due to my friends constantly pointing it out to me. I still have trouble controlling the volume of my voice when talking about my interests, though.
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"All our final decisions are made in a state of mind that is not going to last."
-Marcel Proust, In Search of Lost Time