Great news!

I had a consult with a genetic counselor yesterday and she said there's a 95% chance that the babies are normal and fine (that they are not monosomies). What a huge relief!
The 5% chance is if they were disomies (got the 2 chromosomes from the same parent) and we will test for those using amnio.
I've been reading about the proper nutrition/eating/weight gain for twins - holy cow I have a lot of eating to do! I think I'm going to aim for 20 pounds by 20 weeks and 30 pounds (total) by 30 weeks (but I'm still doing my research).
My 8 week ultrasound is Monday.