I have been mostly playing my survival world and that is the one that finally crashed. Before it crashed it wouldn't work right, I could move around and place/destroy blocks but then after 10-15-20 seconds it would sort of "reset" back to where I was 15 seconds ago, also undoing any block placement/destruction that I had done. Buttons/pressure plates would sometimes take the command i.e. press but then wouldn't un-press, I still log in and my doors are open because the pressure plates won't un-press. I also checked my other worlds which are creative and while I was checking one is when it crashed, but the report says the affected world was my survival. I also tried playing minecraft (using my account obviously) on two other computers before it crashed and it didn't work on those either.