Golcine6

It works fine in the launcher and the first loading screen that shows up before the main screen (where you choose to play with a perviously saved household or start a new game). The second loading screen, the one that shows up before you can play the game, is the one that is giving me problems. It loads until about the end of the loading bar, where it stops and doesn't finish. The music continues to play and the tips continue to show up so it's not frozen, it just doesn't finish. It continues to do this for hours, and it does this every time I try to play with a saved household or start a new game. I do have a lot of custom content and mods and I have tried to uninstall custom content in the launcher but it doesn't uninstall (this is another problem I have that needs to be resolved). My game is up-to-date when it comes to updates, so I don't think that's the problem. I tried to delete all the files in my DCBackup folder except ccmerged.package, but I see no difference. I also deleted the following from my Sims 3 folder under the advice of another person: CASPartCache.package, compositorCache.package, scriptCache.package, and simCompositorCache.package. All of these files are still in my computer's recycling bin, so they aren't permanently lost from my computer. If you know how to fix these, please tell me. All tips, advice, and help will be greatly appreciated.
Expansion packs I have installed:
Bought in store:
Late Night
Seasons
Supernatural
Ambitions
Bought digitally (on Origin):
World Adventures
Generations
University Life
Showtime
Pets
Into the Future
Island Paradise
Worlds bought:
Monte Vista
Hidden Springs
Dragon Valley
Roaring Heights
None of these worlds are installed in the game at the moment. I tried to download them from my 'Purchase History' into the launcher but it doesn't work. I bought all these worlds from Origin. I do not wish to install these worlds until the loading situation is fixed, but if you can help me with this problem I would appreciate it very much.
I have no stuff packs.
Thanks~