What's your nighttime feeding routine? I'd look hard at that and make sure you're minimizing your sleep disturbances. I have always coslept (yes, it can be done safely; check AskDrSears.com for more info), which I think makes all the difference in the world. The American Academy of Pediatrics recommends that mother & child sleep in the same room. I wouldn't have my baby any more than arm's reach away.
You might also want to get your iron levels tested; I have been told a deficiency there can lead to fatigue.
At two weeks old your milk supply is still getting established, so I don't doubt that has some to do with the hunger. Protein is the most satiating nutrient, so be sure you are getting enough, and fiber too.
Also, make certain you're drinking enough. I've never mistaken thirst for hunger, but I keep hearing that people do that. And you will need to be
very well-hydrated while lactating; I think the usual rule of thumb is to drink a glass of water at every feed. You can probably guess how much water that'll wind up as.
