Duplicate Worlds and can't find saved games

@SarahMurdock  Please start by going into Documents\Electronic Arts\The Sims 4 and backing up the saves folder.  (Right-click on it and select Copy, then right-click somewhere else on your computer and select Paste.  Best of all would be to copy it to an external drive or USB stick, but anywhere not in Documents will be okay.)  Now repair the game in Origin: open your game library, right-click on the Sims 4 icon, and select Repair.

Open the game and see whether there are any duplicate worlds.  If there still are, please move your entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop and look again.  Launching the game will create a clean folder with no content, including no saves, but everything will be intact in the folder you moved.  The files just can't be read by the game while they're moved out of Documents\EA.

Don't add anything to the new folder yet—the first thing to check is whether the duplicate worlds are gone.  Let me know either way.

Your saves can probably be sorted out too, but it's easier to get the game into a working state first.

So I did that, but the only thing is that I can't tell if there are duplicate worlds still. Basically, when i would click on the Newcrest (I think thats the name) from the World screen, it would take me to a completely empty world. But when I would click on one of the families I had moved into that world from my saved games page, it would take me to the same world, but with families and houses I had built. Thats what made me think there are duplicates, but on the world page there isn't. I hope I'm making sense.... So I feel like the best thing for me to do would be to find the missing saved games so I have them in that screen again.

Thank you so much for taking time to help me! Please let me know what else I can do. I did repair it like you told me to. 

@SarahMurdock  Newcrest is empty by default: no sims, nothing built on the lots, just a world for you to do whatever you want.  Of course, your existing saves should have your sims in them if you ever added anything to Newcrest in that save.  Otherwise, if you've never worked on Newcrest in that save, it will still be empty.  Still, if the worlds menu doesn't list duplicates, I wouldn't worry about it.

For your missing saves, it's possible that having too many of them in the saves folder prevents the game from reading them all.  If you go into the saves folder, you'll see a number of files named Slot_0000000x.save (x being a digit 0-9 or letter a-f, then it rolls over to 10).  There will also be Slot_0000000x.save.very, with the y being a number from 0 to 4.  Those are the backups for a given save, the data from up to the previous five times you saved before the most recent one.  So you might have six files per save in there, and however many saves you've created.

I'm honestly not sure whether the game will load every save at the same time no matter how many there are.  But you can move all those saves to a separate folder (say, saves backup on your desktop), then start adding them back in small groups.  Load the game to the Main Menu each time, and see what shows up.  Be sure to count the total number of saves available to load—it should exactly match the number of Slot_0000000x.save files you've added back, but it shouldn't count the .verx files.

After you've gone through your saves, let me know whether you're missing any.  It's possible they were moved somewhere else on your computer, in which case you might be able to find them.