AsianMetal The game creates backups even if you don't, so you should have backups unless you deleted them manually at some point. Or if you've been using "save as" instead of "save" and therefore creating new save slots, you might not have the automatic backups, but then you can use the older save slots.
The point is, if you can get an older version of this save to work, you can play it forward and hopefully not see the same crashing.
If you truly have zero copies of this save aside from your current one, things become more complicated, but one step you can try is moving your household to a different lot in a different world. Use a default EA-made lot at first (not one you've built or anything from the Gallery), and if the game works fine, you can try a saved build or a new one.