I had opened up Minecraft to my world and when I got in my base was fine and normal just a bit of lag. But then my laptop died, so I plugged it in and left it for 10-15 minutes to charge and opened back up Minecraft. But when I did I was in a wall and suffocated. So I sprinted back to my base and all of my stuff was back to stone. Only some of my chests were left but everything else in my base was turned into stone. All my enchanted books my mine, cave spider spawner, fish farm, egg farm, sugar cane farm. All of it was gone. The only thing left was my nether portal and some of my chests.