4 days old and gets hiccups

Katie

Hello new mom here. My daughter savanna and I came home yesterday. I pump for breast milk because she stopped leaching on to me and we also use formula because she started losing weight and when she was born she was 5 pounds 13 oz. but in between every feeding cycle and after every feeding I burp her very well. But about 30 mins after eating she starts to hiccup. I was wondering what else I. Can do so she's not in pain ..