@whenohwhen I am so sorry this has happened.
I hope you will just be really nice to yourself and your dh.
Have you had a chance to make an appointment with your social worker to talk it through and find out what happened, with your dh?
"The suggestion is that we move on. I'm not sure if I can or want to. I'm not sure how long any of it might take, I don't know what kind of assessment or who it's with. I don't know why this wasn't done before either."
I think maybe you need to find suitable answers to these questions before you can feel ready to move on.
"I feel like this might be a lapse on the part of ss. Maybe I just need someone to blame"
It's fine to want to blame someone, and if there really were slip ups then of course that is terrible. But these things do happen.
It may be you are able to wait it out, or it may be best to move on. But you and your dh can talk about what moving on means.
We were interested in a child and it came to nothing. We did not get to the stage you did. But I did spend a lot of time thinking about this child. She was adorable looking and we were keen but we were not right for her. It was not the same situation as you at all. However, it was over Christmas (four years ago). Our son has been with us now for over three and a half years. We saw his profile in the January.
I really hope your time will come, do not lose hope in the system.
XX 