I'm now cutting out all formula and breastfeeding exclusively. I fed her for 34 min she slept for 3…

I'm now cutting out all formula and breastfeeding exclusively. I fed her for 34 min she slept for 3 hrs then woke up fed for 47 min and had a 1oz bottle of breast milk she still seems to be hungry.. is it possible to overfeed them breast milk ? she was definitely getting plenty on the boob she was swallowing it and kelpt eating with out sleeping so I know she was getting it.