Ok, well, I might have found out what happened to me.
I was in a dungeon near my house when I logged off last time. I logged in and it lagged severely. I warped out to New City. No problems. I warped back to my home and found that it was all burned up and the forest that I created was burning up, too. I think that was what caused the lag on my end. So many things were on fire, it was crazy. So, that's probably what caused the lag on my end.