I just want you to know there are lots of people on BH who *are* taking you very seriously. You aren't alone, and we are all in your corner.
I get there are some days when you deserve a parade just for getting yourself out of bed, let alone pack that nappy bag, get in that car/on that bus, listen to crying, lay your soul bare to a stranger, deal with an interrupted night. Lots of us get that.
You're not a bad mother. What's passed is past, and you took a step today to seek help. We are all proud of you for doing so. Don't give up now.
Have you spoken to your boss? Like really spoken about how tough things are at the moment? If you had been diagnosed with a serious physical illness and needed regular treatment/rehab, would you talk to your boss and ask for time off? Because I think you would. This is more important.
A few posts back you alluded to the tragedies that can occur involving post partum women. I agree with you wholeheartedly, but I find this comment very worrying. Sometimes it's hard to tell how much your comments are dramatic and blowing off steam and how much they are deadly serious.
Please - trust your boss. Talk to him/her. Or find an advocate in HR to support you when you talk to your boss.