Freezing milk

Am I able to freeze milk that’s been refrigerated for a few days? My baby is 2 weeks old and the doctor wants him to only be fed formula only because he got jaundice from breast milk. He didn’t have jaundice at birth but he developed it over the last 2 weeks. I put my milk I’ve been pumping for the last few days in the freezer. 15 bags. I don’t want it to go to waste. He has a check up in 2 weeks and if his jaundice is improved she said he can take breast milk again. Would this milk still be good for him?