Stuck on Sims Loading Screen

Hi,

I had a file that worked perfectly for ages, with quite a few packs and kits, and mods and cc. Suddenly I go to open it and I get stuck in the endless loop of loading screens. I tried many different ways to join the household, and I can get as far as manage worlds, but as soon as I go to play the household, the loading screen stays there FOREVER.

I looked online through so many different possible solutions, thinking it might be a corrupted mod file or something, but every other file of mine still works, it is just this one. I tried to go back in my save files, but even that would get stuck on the loading screen even when it didn't last time. 

please help!!!