Di Di TWINS at 6+3 only one heartbeat! Anyone had this and successful twin pregnancy?

J

Only one had a strong perfect heartbeat today. The other had a significant smaller sac but there was a embryo and a yolk sac. Last week there was no embryo and no yolk sac in both.

Is there any hope for the second? I'm so lost and sad.

Doc gave the second a chance for a heartbeat in next week about 20-30%.