What Does " A Gest Sac And Yolk Sac No Bby Pole Or Heartbeat" From Sonogram Suggest?

a blighted ovum. well i had a sonogram las week and the doc said that i am 6 1/2 but my cycle is 31 days and lpd was sep 17 but they only saw a gest sac and yolk sac no bby pole or heartbeat so she said it might b am empty pregnancy but i think i am less that 6 weeks so is that a bad sign it already happen to me 2 years ago bit on that sono was only the gest sac so i am so worry they schedule me next week but i am so mervois idk what to think