One heartbeat and one empty sac... what’s happening?

LJ

Today we have finally heard our baby’s heartbeat!!! The best sound in the world!! (Especially after two earlier back to back miscarriages when we’ve never even got to see the yolk sac!!!) and then.... we saw one more gestational sac, which was empty! I am too scared to get excited even about one baby as I don’t trust my body and this pregnancy did have a very shaky start and a big risk of miscarriage from day one - and now, now I don’t even know what to think /feel!!!

Any of you here who may have had this experience of two gestational sacks and one being empty? I’m supposed to be 7w4d today based on LMP but doctor says I probably ovulated later than I thought and he estimated I’m measuring around 5-6 weeks. I had my first us on 1 sep - saw just 1 gestational sac and it was too small. A week later ( 7 sep) we saw a yolk sac inside that one sac. It was a positive progress. And today (14 Sep) we first couldn’t see much on abdominal scan. Then saw and heard a heartbeat on the sac we saw last week. And then!!! We saw one more empty sac ... I’m attaching the scan pictures in order.

Anyway, any comments, ideas, success stories of the empty sac turning into a healthy baby? To be honest, I’ll be over the moon even if just one sticks and is born healthy - two would be an unbelievable miracle 😊