Hey, JS17, great thread. I've been having self-esteem issues too over the past few years, which are either the cause of a recent bout with depression or the result of it (actually, I think it's more like negative feedback). I guess I've always been kind of anxious, but never really unsure of my own worth; and yet, something snapped after my marriage fell apart so that suddenly I'm totally insecure.
From talking to friends and reading stuff online, it seems like my problem is probably a pretty common one, since we live in such a high-pressure society.
I think the problem I've been having is tied to my expectations of myself, which are pretty high, and my persistent feeling that I'm always falling short. It paralyzes me, I've lost a lot of sleep over it, both of which then affect my work and relationships, and that of course makes me feel worse.
I know that the key for me will be to figure out how to change that negative pattern - CBT might work for me, but my current job situation doesn't include insurance and my finances are stretched pretty thin at the moment.

So again, I feel a bit paralyzed.
What's frustrating is that intellectually, I know that my life is pretty good: I'm by no means alone, by no means without resource, and my resume (though not paying well just yet) is actually building nicely and moving overall in a good direction. If I don't blow it, my career is at a pretty exciting jumping-off point.
And yet, every mistake I make just resonates in every cell in my body. Ugh.