Newborn Baby Seem Difficult to Sleep at Night

Hi, is it normal for a newborn baby who is 18 days old to be having difficulties to sleep at night? It is always at the same timing about 11pm to 2am. I don't want to keep giving her milk because I am scared she will vomit. She couldn't stop crying. She will only fall asleep if someone hold her. But once we put her down, she will wake up. Any solutions?