DiAnn Mills @DiAnnMills Guest Post: Kristen Hogrefe Parnell @khogrefeparnell Recently, I enrolled my two-year-old in a two-week swim class. Another mom friend had warned me that her daughter screamed the entire first lesson, so I prepared myself for a similar reaction—but hoped my son would do better. He didn’t. He screamed most of the class until I finally sat next …