So I pump exclusively and my LO is 3 weeks old and he goes thru 4 oz about every 1 to 2 hours before he's up acting like he's hungry again. I'm not producing enough to get much more than that at each feeding and 4oz this young seems like a lot already he goes like 5 or 6 hours during the day without sleeping but still wakes up every 2 1/2 to 3 hours at night. I don't know if my breast milk is just not enough for him and I should supplement formula or should I try methods to gain my supply and just give him more breast milk even though he spit up most of it. Im at a loss at what I should be doing. I thought about giving formula at night and breast milk during the day but is rather not formula feed if I can help it. Any advice mamas??