I'm a FTM, and my son is 4 days old. These last few days have been challenging for me in regards to pumping. My breasts constantly fill & leak, even between feedings - they are so sore & huge! But every time that I pump I seem to only get 1-2 oz. I feel like there's way more milk in there that's not being expressed. I have tried massaging my breasts before pumping, pumping after I shower, I'm always drinking water, etc. Is it possible that I'm pumping wrong? (I have a Medela swing electric pump if it makes a difference).