i really need help my sims 3 is so laggy

@katelynwstxoxo  Some fps drops are normal, although framerates shouldn't drop too low.  For reference, I have a desktop with an RTX 2070, and the game runs at a smooth 144 fps (capped) a lot of the time, at 2560x1440.  But when there are wild horses on the lot, fps can drop into the 70s, and panning the camera anywhere around them causes some stutter.  I've noticed stutter with other objects too, to a lesser extent.  This is with my 2070 not anywhere close to maxed out.  It's just one of the limitations of the game.

You mentioned the Smooth Patch by Lazy Duchess, and I do think it's worth using, minus the two .package files, which can conflict with NRaas mods.  Keep water and high-detail lots to "mirrors only" and 2, respectively, to keep from overtaxing the game engine.  If you're not particularly into horses, I'd suggest disabling them in the game options—as mentioned, wild horses can cause fps drops and stutter, and so can domesticated horses in other households.

Having said that, you shouldn't be seeing micro-freezes.  Please try playing while your computer is offline.  You can sign into the EA App and put it in offline mode, then disable wifi and/or disconnect the ethernet cable before pressing Play.  And please also disable the EA App's in-game overlay; the option is under Settings > Application.