world keeps reseting its self

after a few day my world will reset its self, it will say "problem loading world" and upon trying to reload It I find its reset to when the world was first created. this happens with all the worlds I have created. both survival and creative. I shrugged it of the first few time seeing it as a small rare thing. but seeing that its happened every time. I have decided to report it in hopes of getting it resolved. I can load the world safely a few time. though I may be something on my end of things and not the games.