I've been exclusively pumping and bottle feeding my 6week old, she never has any issues when I give her a bottle of fresh pumped milk, or milk that's been pumped in the past 24hrs and kept in the fridge. However, I've also been building a freezer stash, and when I feed her the milk that's been frozen (and thawed overnight in the fridge) she spits up the majority if not all of the milk within 30min-hour. Has anyone else experienced this? Is it possible for the milk to go bad when it's frozen? I fear I'll end up not being able to use any of my frozen stash and it will all go to waste 😢