Its going to be a tought time adjusting WHG, their is no way around it. I had a great amount of anxiety when my W moved out and was sick to my stomach for a while when I had to go to her new place.
I tried to remain as positive as possible for my kids as they will feed off your energy. I also was frustrated thinking that when my W had the kids and she needed childcare that my sil would care for them when I know they are not getting what I would provide. It was and still is (6 months later) hard to let it go.
However, I also found the dynamic between W & I changed a few weeks or perhaps longer? after she moved out. Their was less tension and her guard seemed to come down slightly. Time and space can be a good thing and I hope it is the case for you.
I recall sulking and moping around the nights my W had the kids as it was so quiet but now I try to find GAL activities when she has them and that has definitely helped.
