I don't see life, decisions taken or letting go of as a mistake. Life is a learning process due to what we experience which is personal. So is fear and there's no antidote if it comes to real fear. At a certain point you discover the fear isn't real or is. There's nothing in between but also this is a learning process and it can take years to figure that your,

Anxiety by the way is way more than fear (I fear that...) or angst ... (can be this is personal as well).

A happy, creative day to you.