It's supposed to be the most exciting time of your life ... and everyone is telling you how lucky you are to have a beautiful baby, but all you can do is cry. You're pretty sure none of your new-mom friends are feeling this way. But they might be. Because 15 to 20 percent of new moms, about 1 million women in the US each year, experience some form of postpartum depression.

Truth be told, my baby days were the...