Yes, if you have AppleCare coverage, by all means use it! Just beware that should anything be seriously wrong with the hardware, you may have to leave it for awhile, so be sure to do a complete backup before taking it in. And, it goes without saying that the pron stash should stay at home....
Given the hour, it is likely that the Bar is now closed and the Geniuses on their way to bed. In the meanwhile, doing an SMC reset may help some: http://support.apple.com/kb/HT3964
Another thing to try in terms of diagnosis is to run an AHT: http://support.apple.com/kb/HT1509