One of the recent posts I found helpful is this Postpartum Depression Quiz.
"Postpartum depression (PPD) has gotten a lot of attention in recent years. While the numbers may appear to be rising, it may also be more likely that it is simply becoming more socially acceptable to admit to needing help and having difficulties in the postpartum period.
"Most women will suffer a mild bout of something called the baby blues which occurs in the first days childbirth. A smaller fraction of women will suffer from an extreme form of depression called postpartum psychosis. Postpartum depression falls in a category on its own.
"In taking this quiz you are looking at some of the most common symptoms for postpartum depression. Certain symptoms, like feeling like you may harm yourself or your baby warrant urgent attention, even if that is the only symptom you experience. The more symtoms you experience, the sooner you need to seek help. Always seek help if you desire help, even if others tell you that you are okay - you are the best judge of how you are feeling."