"Meghan Trainor has wanted to be a mom since before she even knew how babies were made. From the moment she discovered she was pregnant with her first child--her son, Riley--she was fascinated by the entire experience. Yes, pregnancy and motherhood are miracles--but even a miracle can freak you out sometimes. Everyone has an opinion on what an expectant mother should feel, think, or do during her pregnancy, and it's hard not to feel overwhelmed with...