I still suffer from anxiety issues. It will always be with me. In a sick twist of fate I got into IT in a round about way. At 16 I became a complete and total agoraphobic.. couldn't leave the driveway or I'd get severe chest pains, pins and needles from head to toe, I really thought I was dying of a heart attack. I spent the next three years bottled up inside as a recluse and did the best I could with my time.. read and learned, programmed, unix.. linux.. it was all I had. I eventually learned to function and go out like anyone else.
17 years later and I am living in the third largest city in North America, I take trains. I fly for business and pleasure. I still have anxiety issues though. I carry some prescription xanax in the event of a bad one but usually I go down the street and have a beer at the pub which makes everything quite alright.
The last thing I worry about is messing something up at work. If I worried about that I would not be able to do an effective job.