Relax and take a deep breath. You do not know your H is definitely going to get an apartment with the OW. All you know is he is looking. Even though you live in an expensive area and things would be tough financially you do not really want your H to come back home before he's really ready do you?
You've made some positive steps recently and then some steps backward. Five days may seem like an eternity to us but really it isn't that long. Think of how easy it is to put off an errand for a day or two and then suddenly a week has gone by. I'm not comparing you to picking up the dry cleaning. I just want you to remember that the WAS is not always thinking clearly and wants to avoid reality where things require hard work.