I quit without saving. I was scared that saving would make it impossible to fix
Are you really sure that the Sims 4 folder that contains your saves folder also contains the Mods folder and the CC is in that Mods folder? You haven't renamed anything?
Please could you click on your Mods folder once to select it then go to File > Get Info. Under the General > Where section near the top of the info window please copy and paste the location of your Mods folder here. Make sure this is the Mods folder that contains your CC that you're missing.
I'm sure that the saves folder and the mods folder are both in my Sims 4 folder and the cc is in the mods folder. I haven't renamed anything, that I know of. The cc isn't missing, I still get the cc pop up with the list of all of my downloaded cc so I know they're in the game. But even after re-downloading my save file, my sims aren't wearing their cc clothes and the cc furniture isn't placed. I hope that made sense lol
Btw this is the location of the mods folder: /Users/myname/Documents/Electronic Arts/The Sims 4
