towrite,
I know how you feel. When I've been in bad depression, I've almost never let anyone know. I doubt anyone could guess unless they really knew me. (Although I do tell certain people.)
You've been through a lot and you're still going through a lot. Just be patient with yourself. And, make sure you get in touch with any anger you might have. Lots of times depression is unexpressed or unacknowledged anger. My therapist helped me a lot with that.
But sometimes it's about loss, too, and it sounds like you've had a lot of that recently.
Just wanted to say "I hear you."
Be good to yourself. And good luck on the job!! I'm always afraid to tell people, too.
((((((towrite))))))