Sorry for the late response!
This is a save file corruption error. You may be able to retrieve a back-up of your save file, but considering it's been 3 days, I'm going to guess you already started a new game (and thus, overwrote your back-up). Let me know if you didn't start a new game or not, because there's a chance we can still figure it out!
Yes, starting a new game, creating a new character, but NOT saving is STILL creating a new game (as soon as your create a character, the game autosaves and overwrites your current save file).