I know it sounds like a horrible thing to have to do, but call your mom. You don't have to completely debase yourself. Just explain that you had a monster week at work, that you were dead on your feet, etc. and that you wouldn't willingly avoid calling her. If I know moms, what she really wants is for you to reassure her that you love her.

As far as the politics thing goes, I'm way too much of a newbie to take much of a stance on anything. If I could have my preference, everyone would look to people like you, Rossi, and company for guidance. There's definitely something to be said for experience.

I'm sorry to hear that things aren't going well for you. Stay strong! ***zen hugs***