Loading Saved Worlds

I don't know if anyone else is having this problem, but I have a world dedicated to just creating builds, and I have a test sim that just chills at home unless I need her. But I load into the world and pick the lot I want to enter, and on the world map view, it shows the house I was just working on, but once I enter the lot in build/buy mode, the house isn't there. I've tried repairing the app and taking out my mods folder, making sure everything is up to date. It's stressing me out, and I just want to continue my underwater house😔