Every time you get a new job, you go through it?
The elation and excitement come first. It's the "Oh my gosh, I can't believe I got it!" feeling. You go out and celebrate with family and friends, and you're excited about all the new possibilities before you.
After that, however, the panic begins. This is the "Oh my gosh, what if I can't do the job?" feeling. You start to get nervous about your new responsibilities, the new corporate culture, and the new people with whom you'll be working.
While starting a new job can be a stressful experience, this important transition doesn't have to be full of tension and anxiety. With the right strategies and with a positive outlook, stepping into your new role can be exciting and enjoyable.
https://www.mindtools.com/pages/article/newCDV_29.htm