Severe lag after 1 hour of gameplay : requires restart

Hello, and thank you in advance for any help. I know lag in game play has been an on going issue since Sims 2 (I had lag then, too). However, the lag I am currently experiencing is in every aspect of the game. I have 2 saved games, one with cheats on and the other with trophies. In the trophies, I only have 2 families with 2 Sims each (4 Sims total). In my cheats game, I have 3 active families that range in how many Sims are in each. I also typically build micro-houses. Now that you know my gameplay style, let's talk about the lag. From the main screen, the lag occurs. My cursor doesn't move and I can't click on anything. Once I am able to move the cursor, I quickly choose my game. It takes so long to load. Once it's loaded, the same lag continues within game. There is no lag in build mode, but there is in every other aspect of the game. Even in the dressing room, there is lag. Sometimes, when the lag catches up, it makes the cursor super fast and jumps over my options by 3's. I want a red lipstick? Sorry, you can only get to green or black! (As an example). I have saved the game to my ps plus cloud, deleted it from my console, re-downloaded  all the packs I have purchased, and tried playing with new Sims. The same thing happens. Then, I get a notice to tell me to wait while my graphics card (on my PS4, mind you) gets adjusted. Which doesn't change a thing. I have tried moving my game from my external memory to the console and back. This makes no difference. The hard-drive is a 2t with lots of space, so space isn't an issue. My game has all available updates. I also have purchased all but 5 kits. Does anyone know how to help with this?