Yolk sac, but no baby 7w6d - vanishing twin

Jorden

Had an ultrasound at 7w6d. Found out it’s a twin pregnancy, but only one baby was showing with a HB. The second gestational sac has a yolk sac, but we were unable to see the baby. Dr says this is likely a vanishing twin, but I am hanging onto the tiny bit of hope that baby B shows up next week since we clearly saw the yolk sac. Anyone else experience this?