33w5d Placental Insufficiency

So this is my 11th pregnancy, but 3rd (and last) earth-side baby. I have had so many problems this pregnancy, mainly with HG and severe gestational diabetes. At our BPP yesterday the MFM sent us to the birthing center for monitoring because there was almost no amniotic fluid around little dude. Last week everything was fine. I’ve been on monitors and an IV for over 24 hours, and gotten the steroid shots for his lungs. This morning the doctor told me that it’s not the GD causing the low fluid and there’s no rupture, so they believe the placenta is failing. He said little dude isn’t going to make it to term, but hasn’t given me any idea when they would want to deliver. We’ve kept this pregnancy a secret so I have no one I can confide in about how overwhelming and stressful this is. I just wish I had an answer so I could get home to my other two babies.. has anyone had an early delivery for placental insufficiency?