Hi. Meron po bang same case sakin dito? 2 gestational sac pero isa lang po yung nagkaroon ng baby?

I got my first transvaginal ultrasound at 5 wks 4 days. Isa palang nakitang gestational sac no embryo/fetus. When i went back to have my transvaginal ultrasound at 6 weeks 6 days. They found out that I have 2 gestational sac na. One has developed fetus with normal heart beat, pero yung bagong nakitang gestational sac walang embryo/fetus. Is it possible na ma develop yung isang sac ng late? Curious lang po ako what happened to your follow up check ups. Thank you!