Smoke or vapor appearing to be emanating from the vents?

What is your question?

This may be a stupid question- if it's just vapor, I can understand that. I'm paranoid, as I just bought the car about 2-3 weeks ago, and had to buy it in the first place because my previous car had the timing go bad- buying a new car was cheaper than fixing the other (different type of car). This morning it wasn't too terribly hot so I had the window down for the first part of my drive to work, then when I hit the highway I rolled it up and turned on my A/C. I then see what looks like smoke coming out of the vents, and there's a slightly unpleasant smell, as well. I've been watching the temp like a hawk, no over-heating. Now, I'm 7 months pregnant, so the smell could have come from anywhere, and I just happened to notice it because I saw the smoke- but my question is: Is this just condensation, as it's been really muggy here lately, or is something possibly wrong with my engine? What can I do to help keep from needing ANOTHER new car before I can put this one in the shop? (We're still playing catch up from having to pay shop fees on the crap car and buy this one all at once). Oh, I immediately turned off the A/C and rolled the window down, because I didn't want to damage the car, or breath in anything noxious. It has been seeming to bog down just a little lately, when the air is on, but I kind of figured that was normal, especially with a little 4 cyl engine? Thought that may be relevant... Oh, and no check engine lights, A/C is still blowing COLD air, nothing else appearing to be wrong...?