Best of luck putting the house up for sale, hope you find a buyer quickly and a new place for you all. In the no doubt hectic meantime, at least it's very cathartic having a major tidy, clean and throw away, so relish the satisfaction of every room, cupboard and surface sorted.
I can only sympathize with you Leah. I sold my house last year after being there for 30 years. Moving for me had to be done all in one go as I moved just over 3 hours away from my old home, so there was no going back for anything forgotten. But extremely happy now that I am getting settled into my new home and my birds are loving it.