PCGK33 Fan Issue

Hi, I have what I believe to be a fan issue but I'm not sure if it needs to be replaced or if there's something else going on. My laptop is nearing 3 years old. The fan has slowly started making noise to the point where it is so loud (and very hot coming out the side vent) that I feel the need to immediately shut my laptop down (even though I know you shouldn't power off like that). I have an extended warranty with Best Buy and they are horrible. It was sent away for a week and I thought the fan was going to be replaced. Instead, they cleaned it and adjusted an internal control. As soon as I got it back, the fan was making noises again so obviously what they did did not rectify the problem. I don't want to use them again but I have to do something. Also, prior to sending it out, my computer was going into hibernation at random but the DC jack was broken at the time so that may have caused some issues.

Any assistance or direction on what to do next would greatly be appreciated!