babes sleeping through out the day

Sarah
Is it ok for my month old to sleep three hours during the day ? She has only napped twice today for an hour and has now slept for three hours currently 
My doc told me not to wake her to feed y less it's been four and half hours since she has reflux and loses a lot of sleep over it 
Sometimes I worry she won't sleep well at night when she naps this long this late into evening