Just had my baby (edit with pumping history)

My baby is officially a week old and I'm pumping what I consider to be a good amount (about 4.5oz each side on good sessions 1.5oz on bad sessions). I am pumping every 3 hours, at least 15 minutes even if I stop producing halfway through the sessions. My issue right now is my right breast seems to be staying engorged (it's hard just like when my left gets that way) almost but is underproducing compared to my left. Any tips or suggestions to produce more evenly?? Is this a good amount for being a week post partum?