UI and sim freeze

I don´t know what to do anymore.

I started having this problem a little over a month ago. My sim started to freeze. She stood still and only "breathed". My UI also started to lag. It took a couple of seconds before the mouse registered that I was hoovering over something I could press. Also changing the speed took a couple seconds before actually registering. When going from speed 3 to 1, the time would jump back around 10 seconds. It would also jump forward 10 seconds when pressing 3. I tried to reset my sim, but this also took a couple of seconds before it actually did that, and then she would just stand in t-pose, and I still couldn´t make her do anything. Going to build buy, pressing esc, going to manage world etc. doesn´t help. If I go to manage worlds and go back in, the lag is gone for maybe 2-3 seconds before starting again. Everything else, like camera movement and when a menu pops up after a couple minutes after pressing, works fine. The world around, like trees, water etc. also behaves normal. It happens to all sims on my lot though. 

This only happened two times during gen 1. However, now I´m on gen 2 and it happens almost everyday. It first happened around 9am-12pm (it lasts almost always 3 in game hours), but then it changed. My sim was talking on the phone, and I had queued up for my sim to travel to space. The game froze and I pressed cancel on the "travel to space" action that was in his queue (it still doesn´t disappear until the game unfreeze) and after three in game hours, the freezing stopped. At that point I got a phonecall, a university pop up, a pop up from school all at the same time. I also got a notification saying that my sim came home from space intact, even though he hadn´t even been yet!! 

No Crash text och Last exception gets created when this happens, my cpu etc. are normal when it happens aswell. I removed all mods except for mccc, Better build buy, and my CC, and it seemed to have disappeared. I started doing the 50/50 method and thought I had figured it out, but then it happened again after maybe a week in game. I tried reparing the game aswell. I tried playing in a new save for maybe 1 in game week and nothing happened, but because it happens so sporatically it´s difficult to test it out.

I dont know what to do about this, and I´m wondering if anyone know if there´s a certain mod that can affect the game like this, or any mods that are conflicting. 

Mods I use: mccc and woohoo, Basemental, RPO, Better build buy and TOOL, Littlemssam autostart washer and dryer, Sims4me call and visit tweak complete. Lumpinou´s view other sim family tree, dynamic teen life, and some utility mods for others to work. They are up to date and correctly installed. It started to happen before I installed RPO and Dynamic teen life, but added them just in case.

Thanks to anyone that can help!!