Pumping mamas

Fatin

So my son is almost 3 months and I've been exclusively pumping from day 3... I have a pretty good freezer stash by now but I might have to throw it all away. I tried using a couple of the frozen bags while we were on vacation and my son would not drink it, and I just found out that some breastmilk has too much enzymes in it that makes the taste and smell go really bad in the freezer... I'm so devastated, I haven't heard about this problem until now. What a waste of time... Supposedly the milk is still perfectly fine and nutritious but it tastes bad and some babies won't take it. Any other mamas in the same situation? I read that using nonalcoholic vanilla might help but haven't tried yet.