DEAR ABBY: I’m the proud mom of a wonderful 21-year-old daughter whom I find myself worrying about more and more lately. She just graduated from our local college and is heading to medical school in another state six hours away. Rationally, I know she’ll be fine and can take care of herself, but I am terrified that something will happen to her and I won’t be there. My husband and daughter keep telling me nothing will happen and I need to calm down. My question is, how do I go about staying calm when there is danger everywhere? She’s our ...