OMG I get home today from work and my house seems stuffy.. well apparently it seems that the central a/c is not working!!! I went to go look at the unit outside and the fan is going but I come inside and there is no air blowing!! GEEZ.... anyone know what it could be? OF all the seasons this could happen why this one

.. my house is barely going to be 2 yrs old on Nov 30th so how it could it be not working already?