Blue_notanevo

So I own a Mitsubishi Lancer GT 2013 CVT and my car been acting up. After driving my car for like 10min when I'm at a stop my car starts idling from 450rpm to 650rpm and starts kinda shaking. When I have the AC on it does it even more harder of a shake, the AC motor I hear it ahut off and on when it happens and has made my car turn off twice. I wanted to know if anyone knows a solution to why this is happening, it started doing the like 5 months ago. I've hard that other people have the same problem and they say it's normal but I see nothing normal about it doing that. Can someone help me out here? Thanks.