SoireeSenpaii Please test with your Mods folder removed. You don't need to save your progress, and you don't need to wait forever, just long enough to see whether the loading times are back to something resembling normal. If only the loading time into a save is long, try a new save for comparison's sake.
If the new save is affected too, or the first loading screen takes too long even with the Mods folder removed, 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.