Very poor sleep last night, and absolutely black sort of mood this morning. Didn't want to get out of bed, didn't want to shower, didn't want to get dressed, come to work, etc. 

Perhaps it's the transition between one head med and another. I was taking Cymbalta, a serotonin-norepinephrine reuptake inhibitor (SNRI). We've cut the dose in half, in preparation for switching to Celexa, a selective serotonin (only) reuptake inhibitor (SSRI). Both are known for withdrawl symptoms, so perhaps I'm feeling something from the cutback on Cymbalta -- which wasn't doing much for my depression and anxiety, anyway.

I've tried reading the Wikipedia entry for norepinephrine but I can't make any sense of it. Serotonin is a little easier to understand but I just want the transition to be over. And I want to stop feeling so damn depressed and anxious.