Welcome to being a twin mummy!!!

For me I found out what I was having as I felt it would just be easier to have everything ready, room decorated etc for me but I think that is really a personal choice.

My twins were delivered by c/sect at 38 weeks and 1 day. They were 6lb 4oz and 6lb 8oz. I always thought twins would comer really early but who knows when mine would have arrived as it was a planned c/sec due to the position of the bubs.

I would say get your room ready as early as you like. I ordered my nursery furniture as soon as I hit 12 weeks and when it arrived we set everything up ready. Sure the nursery was set up for ages before they arrived but if the babies do come early at least it is done and you don't have to worry and by the end you will be feeling quite uncomfortable and just want to lay on the couch

Good luck. Enjoy every moment of it.