HELP!!!!

[Drakonus]

So i dont know what the hell is going on, but when i logged off the other night my rating was 728. i logged in just now and my rating is down to 468......i need this fixed and i need to figure out how to change my password on duelboard....i noticed this happend like 5 days ago but on a much smaller scale....my rating dropped from 758 to 730.....