K.P.
Hey Cel
I have a 2 week old who gets hiccups every night. I found that if I hold him over my shoulder like I'm going to burp him and just pat his bottom, they eventually go away. If that doesn't work try switching off patting her bottom and rubbing her back. If that doesn't work, when I was in the hospital they told me to feed him to get rid of the hiccups. Hope I helped :]
Goodluck
K.