Re: Storage question
there's really not much research. LLL suggests using "common-sense food handling" for milk, plus it's usually easy to tell when it's bad (smell/taste). and i think different mama's milk is more robust than others. so i personally would use that milk again, at the earliest opportunity (next couple days), but others might not. for a healthy full-term baby.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.