Today is a Blog Action Day for the MOTHERS Act. Read this essay on post-partum depression.
I've written about my PPD before. To be honest, today is a bit of a mess and I don't have time to write about it again, but it sucks rocks, and there is help, and Zoloft is your friend if you feel like you've lost your mind and you've had a baby.
As I said before, this too shall pass. Don't be afraid to get help.