Twins 😳

Well...had my first ultrasound today (by LMP I'm 8 weeks, 1 day)... everything is great! Baby's measuring at 7 weeks, 2 days, HR 160 and...umm...has an identical twin?! The twin is only measuring at 5 weeks, 2 days though and they are pretty confident that it won't be a viable baby, BUT anything is possible and I'm praying that it catches up somehow! I realize that it's unlikely, but could use all the prayers, positive energy, etc. please! Definitely not what I was expecting to hear today... I am in shock, for real.

Anyone have experience with this situation??