Donna - your question was not insensitive at all! Usually, if nothing is wrong with any of them, they will take the one that is easiest to get to. I think also sometimes they would take the smaller ones. In my case, there is one that is easier to get to and the placenta is not on the front wall, which is better. They will first do an NT scan to see if there are any abnormalities, but the peri said that usually they are all healthy.
I'm just really scared and nervous right. Not sure I'll be able to sleep. Thank you everyone for your kind thoughts :) I'm not sure when I'll be up to update, but maybe later this weekend. I just hope everything goes well.