Pumping then breastfeeding

Christina

I dont get how I can get only 3 ounces pumping 1 breast but still have milk to feed my 3 month old son. I had express just after pumping so i know milk is coming out and my son usually has a drip of milk running down his cheek when he pulls off. I'm using a Medela pump so I'm using a great pump. Why can't i pump more milk? I know I got more milk in there. Anybody else have this issue too?🤪