I'm concerned my LO isn't getting enough off my breasts. She is always hungry and usually eats every hour and half. She will occasionally go 2-3.5 hours but rarely. Doesn't give me a lot of time to pump to save up for when I go back to work. She does have plenty of wet and dirty diapers. Is this just a growth spurt? If so, it's been going on for almost two weeks now. She'll be 4 weeks tomorrow. What else could it be?