Sims 2 Game keeps deleting my family?

So i made my family, right? i moved em in, u know. well my game froze (slow computer) so i exited my game, when i got bk into a few minutes later, every single family was deleted like they nvr existed! so i remade my family 3 times and it kept deleting them! so i had my suspecion that when i exit, it deeltes them. so i made a quick fake family, and tried, and POOOF! gone. Help?