From the fear of going in the very first day for
training, to muddling THROUGH the
training despite some rough anxious days, to now two months on the job!!!! That's incredible!!!
I think you need to focus on the fact that you DO have anxiety, and you WILL from time to time have bad days. Now, obviously, the kind of job you do, your boss is right, it's important to not show fear as much as possible.