Almost everything I had disappeared

So I went on an adventure, and when I came back almost everything disappeared, all of my villager except 1, and they were all name tagged. horses (Lost more than 3 already because they just kept on despawning)  all sheeps except 4 and all my pigs and chicken. Please fix this issue it's very annoying that I spent so much time building village and boom they're all gone and now I have to restart all over again. It's to a point that I'm so tired I just wanted quit game so please fix it.