Welcome @Sue77 - sorry you have had such a rough ride.
Just thought I'd share my story to give you a little hope. I had five failures with 'perfect' embryos before getting DS when on immune meds. Hopefully this is this answer for you to.
I am actually cycling again now. After a BFN with our last 'normal' embryo I am risking it with two a normals this month. I know a BFP is unlikely but have some strong immune meds to take advantage of before going back to egg collection, testing etc...
Good Luck, let us know how you get on xx