my baby is 1.5months and takes good amount of feed like for 15-20mins from each side during day time but at night takes feed for 5mins only at one strech from then sleeps. we try to wake her up but the session continues for 2hours and she takes feed for hardly 20mins in total max. what should we do? is it ok to give her feed for 5 mins and make her sleep or should we continue to wake her up as long as she has taken feed for atleast 20-30mins. and if 5mins feed is ok then what should be the duration between next feed