My son is a preemie, he's 10.5 weeks but 4.5 adjusted. He has been very fussy since Tuesday. Today has been better but still not himself. He sleeps a ton and is crying a cranky when he isn't. He is also eating 3 oz every 2 hours, he used to eat 4 oz every 2.5-3 hours. Today his poop has been a little green (this happened before), he does eat breastmilk. He does not have a temp. I am thinking growth spurt? What do you think? If so how long did your LO's last and does this sound like it?