Can't believe this is happening

Divsu • PCOS, annovulation! Two failed IUIs, IVF - 1st FET- miscarried @8 weeks. 2nd FET failed, 3rd FET chemical, 4th - BFP!!
I got conceived through <a href="https://glowing.com/glow-fertility-program">IVF</a> frozen transfer. We saw heartbeat, yolk sac and gestational sac measuring perfectly at 6w3d. I went back today for my 8w4d ultrasound and all they saw in the ultrasound is an empty sac with no heartbeat. It hurts to my stomach. But they referred me back to my obgyn for further consultation and possible D&C if I don't pass the tissue on my own. I'm heartbroken and scared at the same time and cannot wrap this around my head. I don't have any bleeding, or cramping. Did anyone else go through the same?