I have a 5 week old and I have been pumping since I got home from the hospital. THe thing is last week we started with the bottle (pumped breastmilk) and she did fine taking it. THe first couple of times I used fresh pumped milk and she did fine with it. THen I pulled the first bag of frozen milk which was colostrum and she drank it but was up with ear piercing screams cause her stomache hurt from it. The thing is should I just use the frozen milk that is the regualr breastmilk and throw out the frozen colostrum since it hurt her tummy or should I try again with another bag?