If this were me, part of the problem would be that I have to act perky all day and supress my real feelings. I know you're new to this job, but might it help if you took a day off to just be yourself and mourn and feel miserable and - as I call it - wallow in your sorrow and depression? The "wallowing" seems to help me. Rather than deny it I just "wallow" in it and that helps me to get over it quicker.

Although I have to admit, if you really suffer from severe depression, my advice is useless and you really should talk to someone with more knowledge of that.

I sure hope you feel better soon. Sometimes just talking about it makes you feel better....