Fear is necessary for our survival, but we tend to let fear creep up in irrational places that stop us from being our true self. I beleive when you encounter this fear, its a sign that you are on the right path and you MUST confront this fear. When you confront and conquer this fear, the real you, and true happiness await on the other side.
Don't let fear control you, embrace it, face it, and conquer it.