MDB, you are not alone in the immense suffering, not that helps a whole lt. Thank you for reaching out to us!
Even when meds help people, they often don't resolve the underlying issue. There are emerging therapies for trauma-related (child abuse, etc) depression - if this applies to your situation and would like to know more, I'd be happy to share.
You have a needed place on this earth so I hope you are able to hang in there.