Freezing vs fresh

Pari • Mom to a beautiful former 28 weeker!
I am mom to a former 28 weeker (35 weeks currently) she has been home from nicu for the past 3 days. I am pumping and feeding fresh milk as it is easier.. I thawed too much the first night and had to throw it away :( is it better to use up the froZen that i already have and freeze the newly pumped milk? I have quite a bit of frozen.