Chug chug chug

AH! Every time I'm at a stop light and I start letting off the brake pedal, just to creep up a bit, it chugs, not a smooth creep. It almost feels like if you were running out of gas. It just started doing this yesterday and I can reproduce this all the time. When I first started noticing this it was pretty bad in my opinion. The car chugged a little bit even just completely stopped. It's not so bad now but it still chugs when you move forward. After you start driving all the chugging disappears. I don't think it's just "bad gas" because I always fill up at the same gas station and I have had no problems with it with any of my cars, ever. That gas station also has a guarantee that it wont harm your car. I have NO mods such as a tune that would affect things like this, it is bone stock.

I'm taking it to the dealer in a couple weeks to get it's oil changed since it has 2,800 miles on it. So it would be nice if I could steer the mechanic in the right direction when he goes takes a look at my pride and joy. Thanks guys for your input!

Oh I'm not too sure if this might be the case however, if it is I'm SCREWED! I hope it's not a serious electrical problem because tonight I noticed that while I was pulling the stallion into the garage every time I pressed the brake pedal the headlights would flicker slightly. Also I noticed that my dome light was flickering slightly also. Also, when I say "slightly", I mean it's hardly noticeable. I asked my passenger if they noticed it too and they didn't until I pointed it out to them. I'm not sure how the electrical system works; however a weak spark, like you said, might be caused by an electrical problem right? For example, if the alternator wasn't functioning properly at low idle wouldn’t a weak spark be "illuminated" (haha) by different flickering lights?