minesawine congrats to your DS. Really good to get that done before uni.
Piggy if your DS isn't happy with his flat mates after 2/3 weeks, he might be able to put in a transfer via the uni website, or see if there's anyone who might like to swap with him. He might find the girls look after him, and he wants to stay anyway!
Trewser DD has a full on week as she has to study another subject alongside her chosen degree subject, as well as taking two modules in up to two subjects. It must seem daunting, but I'm sure once they get into it, they'll take it in their stride.
New yes, DD is a Edinburgh.
Inter it's only natural to feel like that. I'd say to try and keep yourself busy over the next 2/3 weeks, plans to see friends, jobs that need to be done, nice trip out for family etc.