User blog:Got lag cause i do!/halp my worlds keep deleting them selfs

when i got terraria 1.0.6 i made my first char and world after about 3 weeks, i went on terraria and my world wasnt there so i made a new one same thing this kept happening until there was no "create world" option so i looked in my worlds folder and there where all five worlds i made, then when 1.1 came out i deleted my terraria worlds chars and 1.0.6 and got 1.1 and its still happening i made a world finaly killed wall of flesh in jungle armour cause im pro and got nearly full mythrill armour and now my world has been deleted please help if you know anything about why and/or how to stop it thanks