Although in some cases, dark thoughts can be a severe and debilitating symptom of a postpartum anxiety or depressive disorder, usually they are just an unpleasant part of normal adjustment.

CNN: When motherhood becomes a nightmare

Kids who had been victims only (who never bullied others) had greater risk for depressive disorders, anxiety disorders, generalized anxiety, panic disorder and agoraphobia as adults.

FORBES: The Psychological Effects Of Bullying Last Well Into Adulthood, Study Finds