Breastfeeding

My LO is 5weeks old and I'm breastfeeding her well I'm pumping and feeding her through a bottle. She eats 4oz each and I usually feed her 2-4hours apart but I really try to stay 2-3hours apart from each feeding but what would y'all recommend. She has gained 4lbs from her birth weight so I know she is growing and gaining weight but I want to do what's best and right for her so any advice and is it ok to let her wait 4hours between feelings or no cause it's breastmilk?!???