Twins that may or may not be viable

So today I had my first ultrasound. According to my LMP I should be about 6 and a half weeks... but today there were 2 yolk sacs with fetal poles but no heartbeats in either. Maybe we are earlier than expected but there is a chance this pregnancy isn’t viable. I had 2 losses last year and I would die if I experienced another especially with twins. He said they look like identical twins. Can anyone relate to my situation? Did everything turn out okay? They are rechecking my levels and I’ll have another ultrasound next week. But I’m scared to death. 😭😭😭 I just want them to stick. Please pray for us!