Each month our bodies go through a cycle of hormonal changes. And these changes impact our moods. People like to call it “PMS-ing,” but our cycles are more nuanced than that. Our bodies are undergoing major changes in a quick timeframe—roughly 28-35 days. These changes can cause mood shifts that feel like they come out of nowhere. These changes are normal and we talked with VIS Expert Emily Jacobs, Ph.D., about why they happen.  Jacobs, points out that mood changes are person...