My two year old changed his routine when I was about 7-8mths pg, he went from going to sleep by himself to having to have me or DH sit in the room until he went to sleep. He's still doing it now, maybe give it a try just so that he will go to sleep and then you will be able to as well. I found just this bit of alone time together (even though we don't talk is like a safety thing, maybe for them). I hope that you can work something out so that you will be able to have some good sleep once bub is here.

hugs xoxo