crash game, load up slow with block spawning in diffent location

I was on the game today and loaded the game but then my computer froze with no response from anything.  I hard rebooted the cpu and started the game again and it load it up slower then normal.  I looked in the distance and there was part of solid mountain every where that wasn't there before.  then I when to check out my spawned are with my base and my house was In multiple location and I couldn't even find the up stairs.  the farm I had next to my house spitted into different areas also.  I tried to restart the games multiple times but this just spawning in different areas that was in that location before.  can you help pls?