@Anxiousbuthopeful I'm so sorry to read what's happened to you.
There have been recent posts on Mumsnet from mums in mid 40's that have successfully conceived grown their babies to term, so there is definitely hope. I completely get you being in bits right now as you grief your twins.
I hope you've had people around you to comfort you, and space to process what's happened.
I wish you all the best with your next embryo, when you're ready xxx