I used to believe my work identity was who I was. It wasn't until I didn't have a job for a period of time that I realised just how much I had derived my sense of worth and sense of self from my work. Without the work piece securely in place in my life, I felt lost to myself, less worthy a person, rudderless.
Perhaps you can relate to disappearing into your career, relationship, parenting or a carer role, where you've become so identified with what you're doing, you've somehow lost your self in the process. You've forgotten who you are outside of the role you're in or maybe you just never knew who you were in the first place.