By the very nature of this thread, therefore, take comfort from the fact that you are normal - what is happening to you is happening to others too!
At the end of the day, think of this:
If you always carry on doing each day what you are currently doing you will stay as you currently are.
Get it?
You, and only you, can make the changes.
Please read all the posts in this thread - there are some great replies here, and so I genuinley wish you well.
I cant stress enough that feelings of nervousness or shyness (which you feel are "just you") affect ALL of us at some stage or other - what is more important is HOW we deal with it.