Hi.. I have a 1 month old. She has been drinking breast milk but through a bottle. She had a hard time latching on so I have been pumping since the beginning. I have been blessed with lots of milk so I have already started freezing it. Is it too early to save for later? I know I have to use it within 4 months (and 24 hrs after it's thawed) but will the nutrient still be good for when she is older?