Check and see next time you get your oil change if you have a "Cabin Air Filter' installed... That will help tone down the air coming into the space. It won't solve your problem, but at least if it IS something normal, you don't have to suffer.
As for being an Auto, you shouldn't have any problem with an AT as long as everything is working properly. But it wouldn't hurt to go out in the morning before you move it and look underneath for a fluid leak. Or put it on a lift and take a look see underneath.