twin pregnancy

Ta

today I found out I am pregnant with twins. the ultrasound techs were pretty surprised because they saw two yolk sacs but kept saying they were in the same sac together at least from what they can see right now. both babies were measuring 6 weeks and 5 days which they said is good they are both measuring the same size and baby A heartbeat was 130 and baby B was 127. of course I started googling about this one sac thing and I start seeing all kinds of things so I'm wondering anyone else have this happen or pregnant with these type of twins. thank you so much in advance. I had an ectopic 6 years ago and this is my first pregnancy since so I was worried it was ectopic again since only one tube and ovary and the one tube was sewn back together but to find out today they are in my uterus was wonderful