In case you didn't see me link to this over on the Postpartum Progress Facebook fan page, here is a great article from Psych Central on what you need to know about discontinuing psychiatric medications like antidepressants.
I see people quit cold turkey (don't do it!) or quit too early (not helpful!) all the time, so I think the article is a great one. When it's time to do it, do it the right way! Print the article out and keep it for the time when you are ready to work with your doctor to follow a plan to stop if indicated. Also, know that some people remain on medication or other treatments, particularly those who already have chronic mental illness outside of or in addition to PPD.
And, if you haven't become a fan of Postpartum Progress on Facebook, I hope you'll hop on over there now and rectify that situation!