Thanks for the responses. I guess I will let her eat when she needs to for those few days and then we can go back to feeding every 4 hrs, and you are soooo right, she will probably wake more at night to feed if she is not getting enough.
Right now I put her down after her 7pm feed, DF at 11, she wakes anywhere between 1:30 and 4 for a feed, and then she is back up at 6:30, then feed at 7am.