My air conditioner stopped working. No air blowing in the front but cold air still blows from the rear air. Was working fine one minute, was doing nothing the next. Anyone know what it may be?

I am getting so frustrated! This is my first BMW, I have only had it for 5 months, and all of a sudden things are just falling apart. Its an 03 with only 54K miles so with the low mileage I would not expect to have some of the issues I have been having.