hey, my name is M.. i just wanted to offer a suggestion. My step mom suffered from postpartum dep for a year or so after her baby was born, so i am understanding of it, even though i have never actually gone thru it myself. what i wanted to suggest was to take fish liver oil. It's been known to prevent postpartum depression without the use of meds. When you are pregnant, the baby pulls something from your brain that she needs, but it's the thing that causes you to be happy and stable emotionally. The fish oil replenishes that.
Once my step mom started taking it, she saw a significant difference in her thoughts and emotions within a week.
(also, during both of my pregnancies, i doubled up on it, and i never went thru any depression. my step mom never took it at all during her pregnancy.)
Hope this helps.
M. L. =)