For many people, a lack of confidence fuels a level of interpersonal stress that makes meeting new people and interacting with coworkers and supervisors. If you find yourself struggling with interpersonal anxiety, you might want to give this Greatist article a read.
It lists several different tips and tricks, such as keeping a record of positive feedback that you can use to build up your self-confidence and relieve your social stress.
Read the full article here: http://greatist.com/live/how-to-be-more-confident-instantly