@sunshinebeliever I can give you some things to try. First though is to simply shut your console completely down. Give it a couple minutes and then power it back on. I don't know which console you are on, but be sure you aren't putting the console into rest mode, but actually shutting it down. You can unplug it after a shut down.
If you have a very old save with lots of played houses or just one family that's very old, go through personal inventories in Live mode and household inventories in build mode and sell off everything that you don't need in there, like appliances and career rewards you aren't using but can easily purchase again.
If you have a lot of emotion items on the lot, turn them off. Almost all of them can be disabled except a couple that are bugged like the culinary career pot rack and any pictures you took with a camera that have emotional auras. You can have Sims simply view the emotional object for the moodlet or simply turn them on if it's a child and turn them off again when not in use.
If you have an enormous garden especially if the plants are perfect, sell the produce and then put the empty plant in storage of you don't need them growing. Or save the garden to your library as a room and then sell off the plants you don't use.
If you have tons of collectibles, also you can save the completed collections to your library in a room and sell the originals.
Check your bookshelves and fridge and any storage chests/toy boxes. Sell off duplicate items or anything you don't need.
I'm sure there's something I am forgetting but I think this should at least get you started to improving your gameplay.