No fetus in sac.

Hello. Meron ba dito same situation, my LMP was nov14 2020. Nag ultrasound ako last dec28 may gestational sac na pero wala pang baby 5wks 6days na daw. Nagpaultrasound ulit ngayon pero wala paring baby inside the sac 5 wks 7days daw yubg size... Miscarriage po ba to? Sa saturday pa sched ko with my ob. Im so worried 😢