Starbright,
I had a cycle cancelled due to hyperstimulating, I had trouble breathing and moving as well. I tried to pretend to be healthy on the day of the PU, but the look on my face when I moved told the story. On the other hand you have a lovely supply of embies in the freezer, and transfers for when you are well enough. I might be wrong but I do remember a nurse telling me that there is higher risk of MC if you transfer during hyperstim.
I hope you feel better and although it is heartbreaking now not to transfer you want to give the littles the best chance to implant in a healthy mummy
Bec