Extreme Fan Problems (Alienware 13)

Ok, so for Christmas I got an alienware 13 laptop.  Everything was working fine for about a day, until the day after I got it.  So I was in a Skype call, and for about 20 minutes everything was fine, the battery of the laptop was fully charged, and everything was running smoothly...  Until in my headphones I heard a really loud fan noise, and I started to lag, and then my call paused.. This has continued to happen for the entire day, every 30 seconds, with no sign of stopping...  Please help me fix this problem so I can get back to gaming and talking to friends!