I had loaded up the world, and I was stuck in a wall. Once I escaped, I noticed that all progress I had made in the past 2 days had disappeared. All of the chunks were in the wrong places. For example, there were bits of the nearby mesa that were suddenly in the forest, and pieces of the desert were suddenly in the plains. Attached is a screenshot of my area, I hope that gives an idea of what the are looks like. I have no idea what is happening to my world, and I could find nothing that might help me to fix it. Please, if you can, help me restore my world.