@LoveInHarmony
I don't know if you have mods or not but the things I have found that cause pausing in my game are; lack of memory - program running in the background while playing sims, bad or outdated mods (mods older than 2 yrs while they may technically work in game are not updated to the latest patch & often reintroduce old bugs or issues to your game), too many 99+ items in various storage devices (refrigerators, chests, flower bench, sims inventory), and for me those large saddle on a pig builds I create for sims houses such as 4 stories - 8 to 9 bedrooms & every conceivable work bench, fitness machine, or any other device used to make things for the sims plus all those garden plants and all those wonderful animals....
These are the things that I attack, alter and change when I start having pausing issues with sims.
If none of these are your issues I apologize for any offense you may feel.