Lost Saved Games, Replaced with Old Files??

An auto-update on Sims 4 today caused an initialization error that I had to troubleshoot, as it wouldn't let me open the game at all. After trying some troubleshooting, I was able to open the game again, but it's completely lost my most recent saved files, played as recently as yesterday.

However, it recovered old files that I thought I had lost, from a separate device that crashed over a year ago. I don't know how those files would even be on this new device, other than some automatic cloud saving that I'm not skilled enough to know that I even had set up.

I'm fairly sure I screwed up when I was transferring my EA folder from Documents into Desktop; I believe it asked me about replacing some files with the same name, though I can't recall exactly. I didn't know what I was doing, and now I'm afraid my newest save files are lost forever. They're not in my Recycle Bin. I've tried so much troubleshooting at this point, and am hoping I can get on a live call with EA support or Geek Squad to help ASAP. But I figured I'd ask here too.

It seems unlikely that the files could be completely lost, since somehow I'm able to accidentally recover files that I thought were lost over a year ago. How can I get my most recent saved game back up and running??