Sis, if it is the worse, and I really pray it isn't. Is it too early for them to do testing to see potentially why it's happened twice this year? You're on progesterone so it likely isn't that. I have read they can do genetic testing to see what's happening but not sure if you were too early for that or not? Or perhaps it could be thyroid related? I have also heard that issues with the thyroid can play a big role. Are you still with a Reproductive Endocrinologist? Maybe you can ask them if something can be done to see why this keeps happening.
Still hoping for a miracle.