overheating 300

Couple days ago my 2006 Chrysler 300 3.5L started making a weird noise randomly and what almost sounded like it was revving on its own. Later after driving it the temperature gage quickly starting rising towards H. after driving it back home on a 20 minute trip the car overheated and stopped...

First off let me say hi to everyone! I'm a noob to this board, obviously, but I'm hoping that someone here can help me figure out this problem I'm having. About a week ago my car started to overheat. Now to me overheating is anything above half since the car has stayed about 2 notches below...