You have an inner critic!  It will never go away. 

You have a choice to stay in the control of your ego or risk following your inner instincts.

Your inner critic wants to be your friend. Your ego likes the status quo. Your inner critic wants you to keep to the familiar so it can stay in charge.

The secret is to begin to befriend your inner critic.  Let it know how much you appreciate its desire to keep you safe.  Reassure it that you are now an adult and can take good care of yourself.  Over time your inner critic will quiet down.

The Enneagram is an excellent psychological-spiritual map that can show you how your inner critic tries to control you.  Each personality type has a different message and relationship with the inner critic.