on the boob all day!

Mom • My name is Raschel. I`m married and have a wonderful 4 year old son and a beautiful rainbow baby girl born nov 2016.
My baby is 16 days old and she's been on the boob all day long with one nap. My lactation nurse said to only let her nurse a total of 30 minutes at a time but I hear her drinking and if I take her off she cries.., I don't even have time to pump. Idono what to do.