I got a new job and i leave for my 4th shift so far here in a little bit. For whatever reason i get so nervous before each shift. I get the worst, world-is-ending anxiety so bad in makes my stomach hurt. My job is a SA at a retail store. It should not make me feel this way and is really not that bad. Once i get there the anxiety fade after like an hour or so. I think im scared of messing up or doing something wrong and getting fired because of it. I really hate this feeling. Is there a way to prevent this from happening?