This is a humble realization that only takes introspection of one's self to discover, and I am so proud of you! It's something I can also relate with, and I can tell you for free that it also limited me for years until I decided to fight back. The fear didn't go away completely but it's almost non-existent when I'm on a journey to achieving something.
I hope you have more strength to continue facing yours too, till you conquer it to the point where it holds no grip on your life. I'm rooting for you.