Congratulations! What a blessing. My dd got hiccups all the time. As long as your baby is growing, she will get hiccups, and newborns are not nearly as bothered by them as mommies are. Feeding her formula or breast milk may help, but you really don't need to worry too much. But never give a newborn plain water. (Unless of course ordered by a physician, for which I could never imagine a reason.) Newborns only need forumula or breast milk, and water can knock their nutrition off track.
Best wishes!! Take lots of pictures-she will be two years old in the blink of an eye. ;)