this explains my citibank bill...

From a CNN article:

Why sadness can blow your budget:
If you're sad and shopping, watch your wallet: A new study shows people's spending judgment goes out the window when they're down, especially if they're a bit self-absorbed.

http://www.cnn.com/2008/LIVING/personal/02/08/sad.shopping.ap/index.html?iref=mpstoryview

Love the 'especially if they're a bit self-absorbed'...usually whenever I am feeling down it is because I have been thinking of myself way too much!