You came far in life because you listened to yourself, you were courageous, you took the risks, you executed and had faith. Remember that next time you start doubting yourself.
This is free advice from an expensive psychologist.
If you're an anxious person, do everything for fun. Go to a job interview for fun. Submit documents for fun. Start a blog for fun. Anxiety feeds on importance. Don't make everything a matter of life and death.