I never said mental preoccupation was unique to me. I know most, if not all people think about how they are perceived by other people. But when it gets to the point were you have panic attacks, constantly on edge and end up avoiding going out, you have social anxiety.
Yes, I know I can't read people's minds. But sometimes your mind is stupid. I could read every philosophical text in history, and still be extremely conscious of what people think of me.
I'd say I didn't even have severe social anxiety. I just made the link between self-doubt and anxiety. People on this site look down on Ford Drivers but at the some time are afraid of what they think of them. See, sometimes things just don't make sense.
I have never studied philosophy so I can't make a response concerning semiotic freedom, I'm sorry. But what you're saying is right.