Inadequacy at work

I had a helpful coaching session today where I explored feeling inadequate in my job and some thoughts to practice moving toward feelings of competence and peace such as “I’m learning how to handle any situation at work” and “it’s possible for me to leave work at work.” But in the face of strong feeling of anxiety and inadequacy it feels like these thoughts “aren’t working.” I just want some relief as it feels like I am constantly anxious about my job.