Doubt is defined as:

1. feeling uncertain about something. “he looked doubtful, but gave a nod”
2. not known with certainty. “the fire was of doubtful origin”

Doubt seems to be able to travel from one area of life to another. If you are doubtful about leaving a job or about what type of job are you trying to get, can that impact other areas of your life? Does it impact self confidence? It has for me. I start to let the voice of my own self doubt creep into many areas of my thoughts. What do you do when you doubt?

Here are a two articles of what to do when you doubt yourself:

https://www.americanexpress.com/en-us/business/trends-and-insights/articles/8-ways-highly-successful-people-overcome-self-doubt/

https://www.lifehack.org/567587/the-reasons-of-self-doubt-and-steps-to-deal-with-it