Breast feeding question

P • Mom to angel😭👼🏽5/27/18.... 🌈 👧🏽Princess Ava born 6/6/19🎀🎀!!!!! Baby H due 2/16/21👶🏽

Hey mamas. I’m breast feeding with the use of bottles. My daughter doesn’t like the nipple shield right now, so I can’t put her on my boob as I don’t think she’s quite grasp that yet. Ok, I have three 8 Oz bottles of milk that I froze days ago with the label saying it expires today and I’m wondering do I need to unthaw and use them all today or dump them? I really would hate for that milk to go to waste. I’m confused as I’m still learning about breast milk and storage. Thank you in advance.