If you are seriously bothered by your ill self esteem and disturbed with an urge to overcome this situation, you are at the right place.
Try and figure out what you had then that made you feel the way you felt. & find out what is the cause or course of events that caused you lose your self confidence.
Think clearly about the reasons you started losing your true nature and determine if the reason is worth losing your peace of mind & thereby the lack of the feeling of content.