No HeartBeat

I took an ultrasound scan today even though Doc had suggested to take it on Nov 5th. I dont know my LMP and I tested positive when I skipped my periods. The gestational age was noted as 7weeks as of today with Mean Sac Diameter (23mm). Ultrasound was done transvaginally. Problem is no yolk sac,no fetal pole or heartbeat was detected. Does this mean its a failed pregnancy? Shouldn't the vaginal probe found a yolk sac atleast?

Update: Took the second scan today. Diagnosis came as anembryonic pregnancy. Thank you everyone for your support!