very long time gap between fees

Hi my baby is 4.5 months old he is only on breastfeeding.before I used to feed him every 2 hrs his weight gain n activity everything good.but for past few days he didn't take feed for atleast 4 to 5 hrs. Very long time interval between feed.in night same 5 hrs gap.if I force him for feed he is crying very loudly n turning his face i can't force him much, plus advice is it normal