A woman in postpartum depression (PPD) should remind herself that there are options open to her. She will benefit from talking to someone who is understanding. If she's still seeing her obstetrician or her nurse midwife and she is comfortable with them, they would be good people to go to.
A woman in postpartum depression can go to her community mental health center. If she feels really desperate she can go to the hospital emergency room where they can evaluate whether she poses a danger to herself or others. They can give her recommendations on possible tools and resources.
A woman in postpartum depression usually needs someone who understands PPD and and someone who is understanding with her.
"Carole Sheehan is a nurse at Carondelet St. Joseph's Hospital in Tucson, Arizona and the founder of the Tucson Postpartume Depression Coalition. She works to raise awareness about PPD and introduce screening as a method of prevention through prenatal visits. She also encourages the distribution of information about PPD to pregnant women so they have the tools and resources to get help when they need it."
Video
https://www.empowher.com/postpartum-depression/content/what-should-woman-do-if-she-thinks-she-has-ppd-nurse-sheehan-video