It lasted two weeks for me after DS. Kicked in about day 3 after birth. I would cry about everything. Offers of help from friends, listening to music, looking at my baby. You name it, I cried about it. I cried all over the Child Health nurse too. But it passed eventually. I knew it was hormones as it felt so very different to when I had suffered from depression in the past.
I hope it passes quickly for you too, Sugarskull!