My beta started falling today. There was nothing on the ultrasound.
RE says my lining is very thick, so I have to follow up with him on Wednesday. He doesn't expect me to actually miscarry for at least a week, because my progesterone is still very high.
So now, I just get to wait, knowing I will never meet the child I am carrying. It is so hard to say "goodbye" before we ever get a chance to say "hello."