My whole career I have thought that someone is eventually going to figure out I don't know what I'm doing and fire me, I think low self esteem comes with the territory. Probably from growing up feeling as if somehow you're not good enough for mom or dad to really love. It's tough to overcome, if even possible. I've learned to live with it and laugh at myself for it but it doesn't change the fact that I think very little of myself. Counseling helps.