You might have expected jitters before your wedding, but you may not have counted on sleep deprivation, too. Lack of sleep can make you feel awful, interfere with your personal relationships, and destroy decision-making abilities. Anytime you get less than seven hours of sleep, the emotional center of your brain becomes oversensitive to negative thoughts and emotions. At the same time, the brain’s logic center slows down and doesn’t keep your emotional responses in check. That means you’re more likely to experience outbursts and more stress, which continues the cycle of stress and sleep loss.