SrgtMarsmallow When you say you tried backing up your files and restarting, do you mean you moved or renamed the Sims 4 folder in Documents > Electronic Arts, so the game wouldn't load any of your old data? If not, please try that now.
If that doesn't or didn't help, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.
Please also let me know what world(s) you've been playing in, and on what lots if it has only been a few.