When the sun hangs low in the sky, shadows become giants. A low mood causes similar distortions of perspective, stretching small issues to proportions that may seem insurmountable. That's why it's better to work on the mood, not the problems. You can protect yourself from the mischief of a midweek Mercury retrograde by giving yourself what you need to raise up the sun in you. Once you feel better, problems settle into their proper size.