I'm very glad on finding this tread and knowing I'm not the only one having these issues.   I left a job after 5 months due to this. plus other organizational issues within the company that made my job not rewarding or having the feeling of not acomplishing anything at the end of the day.   What is sad is that I made tons of friends on that job and the people training me never quit on me but I quit on them. Its very sad. I was working with the builder of the year in my city.   I've been on tears for the last 2 days. and I'm close to my mid 30's   the new job is a step up in my career, still on the same position but the duties are way better (at least on paper, I have to see on Monday when I start) and more money with more career development. the organization is way better too.   I should not be afraid on failing on this job since I have done this for years and one company that I worked for 3 years, the person training me had worked in this company before. This person told me that I would do fine since he taught me all I need to know.   Still, I feel afraid of failing or people expecting a lot from me.   Reading this tread has helped a lot in dissipating these issues.   Thank you all