night feeding

My baby is 2 months old and ever since about a week ago he began to go 6-7 hour stretches, sometimes a little bit more, without feeding at night.. he was fairly consistent with waking up about every four hours and suddenly he spends almost the whole night without feeding. During the day he drinks 4oz every 2-3 hours. Is this normal for a two month old? As a first time mom I really don’t know if it’s a normal thing for him to do.. is it okay for me to just let him do his thing or should I be concerned?