Feeding time and crying spells

My baby have gone EBF for a week now and unlike before na natatrack ko ung oz ng naiinom ng baby ko, now na EBF na, hindi ko na nakikita how much naiinom niya from me. Pedia told me to feed my baby for 10 to 15mins, one breast at a time but I feel like she isn't getting enough milk so mejo ponapasobrahan ko konti sa feeding duration until 20 minutes. Pedia also told me to never feed my baby before 2 hours and 30 minutes prior to last feeding but my baby cries after 2 hours, so I have to let her cry for 30 minutes palagi until umabot kami sa minimum na 2 hours and 30 minutes. Any tips or ano po ung advice sa inyo ng pedia nio about feeding esp. EBF?