Some babies will not for the life of me hand feed. Usually they get at least a little more comfortable with you as they get older, and it will likely get easier to get her to hand feed. (Hey, if a giant was poking food around near my face and home, I wouldn't eat it either!)
Yeah, don't withdraw food like you could for an older animal. At the most, maybe just a few hours and see if that helps. If not, just keep trying. I also used a very soft chopstick (no splinters obviously) and cut it lengthwise about 1". Then you can stick a cricket leg through the split, and hold it up to the chameleon. Sometimes the ones that wont eat from tongs/tweezers will eat with a chopstick. Probably because it looks more natural. If she seems hesitant, try making your hand non-visible for a while. Eventually you can try showing more of your hand or moving your hand closer to the food/up the stick, etc.