Ok. I don't know what is going on. My expressed milk keeps turning sour after 1-2 days!!! I have tried placing it in various places in the fridge. It is in bottles, had it in bags before and still no difference. It is definitley sour..not only smells bad but (not to be gross but this is something I'm feeding my baby so I want to be sure) I dipped my finger in and tasted it.....absolutley horrible. The sour taste was overpowering the sweet taste. Almost as if it had been spit up. I don't know if I dare to start freezing yet as I really don't know if I will have the same problem. I have already thrown out about 10 ounces this morning...thank goodness I'm ahead in supply by a day. I have thrown out over 30 ounces in the last 2-3 days. Please help me. Oh, I did have a case of thrush which was treated and I'm now over it...just in case there is any relevancy here. The dr. has me on a maintenance program (1 pill per week for a month) of generic diflucan. I still have to take the last one this week. Thanks to all in advance for your help.