Good article on how sleep effects emotions
I've been there. In fact, I'm sort of there today. Husband left at around 4:00 am this morning and I couldn't go back to sleep. Not only am I cranky, but I hurt.
Experience tells us that sleepless nights can lead to overwrought emotions. Now scientists have uncovered some of the first evidence of how this occurs. Their imaging studies show that lack of sleep can lead to greater activation of the brain’s emotional centers and disrupt the brain circuits that tame emotional responses.
Source: Sleep Education.com