LO won’t drink her bottle

Brittany • 6.13.15💜 Dog Mom🐶💜 Lilly Rose 11.5.19💕

My LO is 12 day old and the last time she had a 4oz bottle was about 3 this morning. When she woke up at 6:30 for her normal diaper and bottle she ate maybe 1oz, then when she woke up again at 10 for her diaper and bottle she ate another 1oz. I’m a first time mom. Should I be worried? Is there anything I can do?