can i formula feed during the night? i bf during day and express as my son needs to get infant gaviscon for reflux. just spent the last 2 hours feeding, him falling asleep and then him crying for more, feeding him again etc until now i have given him formula and he seems to have settled. i'm starting to lose the plot and verging on completely formula feeding. he is 10 weeks old but was 8 weeks premature. does anyone else bf during day and ff at night?