Well I've finally determined that I may be having a chemical oxidation situation with my pumped milk. Does anyone have any insight on this? I haven't gone in to LC yet but plan to try the general suggestions first like eliminate tap water and check my prenatal vitamin. So far I know my milk is only lasting two days but it may be less than that. Luckily I'm only working one day a week and dd seems to have taken the bottles fine while I was away so far. Would love any tips or personal experience!