Wow, I find this post very valuable.
First off you are a good writer, secondly and most importantly to me you appear to be capable of being honest. This to me is far more valuable than being a "good writer". It is very common that people have fear, doubt and confidence issues. I had never heard of this "syndrome" before but doesn't matter what its called its real and affects many.
I my self have no problem with this anymore but used to live my life constantly terrified of what others thought of me. Its a scary and sad world.
What I can say is that it is possible to overcome this. This post seems like a good start to doing so!
Best Regards~*~