Newborn Feeding

I know newborns should eat every 2-3 hours, and I've been worried about weight gain since we're having latch difficulties, so I've been waking him every 2 hours to feed but should I wake him if he isn't cueing? or should I just wait another hour unless he starts cueing in that time? what do you guys do? He's about 2 weeks old now. He gained past his birth weight at a week and a half.