Giant Chunks of Minecraft House and Village are GONE

I was out in the ocean and was killed by a Drowned, and I re-spawned back at my original spawn point, instead of in my house. When I came back to my house, 3/4 of it was completely gone, as if it had been wiped. I know it wasn't a fire because cobblestone, glass, and ALL of my chests are gone as well as wood. The village by my house is completely messed up, houses are cut in half, even trees are cut in half. Other people have had this issue but I can't fine any actual answers as to how to fix it! I need help! I have no expansion packs, just very normal playing in moderate difficulty