A Huge Glitch With Game

[xxxrachelxxx]

Hi, I have Sims 2 (PC). About a year ago, I got a bunch of E.P.s (4 or 5!). I already had 1 or two. Okay, so I installed them just how I usaully would, and I played the game. All of my stuff was gone-- like I started the game over all again. And the weird thing is every computer account on my P.C. basically has it's own game. And custom content DOES NOT WORK. I used sims 2 stuff packs, and I'm sure I got meshes, and they just don't show up in the game. I even remembered to install them  . So, what's wrong with my game? Should I just reinstall everything, and hopefully it'll be back to normal? Or should I just go with the flow and play a boring game (come on! no cc at all!)  {unsure}