Okay, I don't know if this just happened since Nightlife, but now, whenever I take more than 1 picture, it over-rights the one I took before it. So, I cannot take multiple pictures of my sims, and if I capture a really good picture, I might accidently take another picture without renaming it, (which is really hard, because I have to close out of the sims, then) it disappears.

Er, does anyone know how to fix this?

Are you sure you are looking in the right place? Since University the pictures are in EA/TheSims2/Neighbourhoods/N001/storytelling. The neighbourhood number varies with which neighbourhood you are using.

This thread will give you the details: http://www.modthesims2.com/showthread.php?t=53048

Oh my god. I just found all these pictures I took! ^^ Thank you!!