pessimism

I tried to do a little trick favored by cognitive/behavioral mental health professionals for improving or reversing a bad mood. In theory, it makes perfect sense, you're supposed to counter every negative thought with a positive thought thus regaining control of your emotions. But I think we all know what bullshit that is if you are in a truly despairing state. Today I couldn't help allowing myself to get sucked into a downward spiral and just wallow in my misery. Here is what is plaguing me:

Being confronted with the worst aspects of human nature lately
People getting angry when I don't act as they predicted, relationships suffering
Worries about everything, mainly failing to meet expectations I had for myself

Ok, I hope I'm not having a nervous breakdown...but something has to give, I can't stay this stressed.