Kar, yep the time waiting for scans is torture! We told our parents and immediate family at 6w (we didn't find out til 5w or so along anyhow). We told friends after the 12w NT scan. I think the way to decide who to tell is to think who you would also be comfortable telling if anything went wrong with the pg (NOTHING IS GOING TO WRONG WITH YOUR PG!!!!). Good luck for Tuesday!

Trish you must be getting ultra nervy/excited now!!