I don't think your h told you he was returning this weekend. I think it was a spur of the moment thing w/him. I also think that by you standing your ground and wanting to move forward on the divorce has shook him to his very core and that's why he's there this weekend. Another thought could be that he's curious to know what you are up to and w/whom.

I hope you are doing better today. Try to rest up if you can.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.