My eldest daughter had PND when her son was born 7 years ago and was admitted to a Psychiatric Hospital for about a month as it was very severe. You might all think what? ... a psychiatric hospital ... but the staff were wonderful. Granted they do get some weirdos there but my daughter was not one of them.
She was given medication for a chemical imbalance and it took a few goes to make it right ... had to keep taking medication for about 18 months. Now 5 years later, she's still healthy with no ill-effects.
I had mild PND with this above daughter 29 years ago and had to do it alone as PND was an unknown condition. At that time, I didn't know what it was until years later. I then had 2 more children but no PND at all.
Try if you can attend a support group? ... with deaf mothers, if any? There are helps available and with good support most women make a full recovery. There are also lots of PND's real-life stories on Google.
PND is preventable and curable ... it is a condition that can be fixed.