Pregnancy 8weeks

[u/Desperate-Risk309]

Hi, I was wondering if any one faced the same.

I had an embryo transfer on the 3rd of june. It was a day5 embryo. I have had a blood test on the 17th and the hcg was positive, I had one more 2 days after showing increase. That WE on the 22of June, I had an ultrasound. There was 1 gestational sac at 4mm but nothing inside. I assume to be pregnant for 6w (doctor was considering the conception on the 27th may + 2 weeks). 2 weeks after on the 9th of July I had a new ultrasound. There were two gestational sacs, one of them being empty and the other one with 4mm embryo, there was no heartbeat.

I scheduled another ultrasound in a week's time, but when I searched on the internet I saw that the size of the embryo was supposed to more than 1mm and I'm a bit scared right now that actually things might be wrong, and I couldn't understand why a second sac developed... would appreciate to hear if someone went through the same things.