Sorry to hear of your loss & so sad it was over Christmas. I too became pregnant but miscarried at 6 weeks. I left MIVF & I am seeing Lynn Burmister at Monash she seems great. After 1 m/c it's hard to get many tests but questions can't hurt. I'd ask if you should have more progesterone support? If its a simple test to test for NK cells.
If you ever need to chat, I'm here!