Gestational Sac but no Embryo

Hi mga mommies, i just went to my OB for my first prenatal. NagpaTVS ako,may nakitang gestational sac pero walang embryo nor heartbeat. In my counting based on my LMP supposedly 6weeks ako and un din ang estimate ng TVS. Pinapabalik ako after 2weeks for repeat TVS. I dont know if its a sad news or time to finally rejoice. Haiz. I dont know if I can bear two miscarriage in a row which I pray hindi naman po. Anyone po experienced this? At least my positive testimony to bring me back to my senses,it would mean a lot. ? Thanks.