Anyone who breastfeeds and pumps i need advice so badly please

Ma

My left boob is like dying. My baby doesnt get enough at his feedings and its wearing me out. The lactation consultant said to pump one breast while he feeds on the other. She also advised to pump in between feedings to help boost my supply. I also bought herbal tea mothers milk and am having my mother bake those lactation cookies for me. This is all im getting when i pump both breasts. I am using a medela advanced pump in style. Its a brand new pump. He feeds on each boob for 15 mins or so at each feeding. Sometimes a little longer. Then he acts like hes done and is falling asleep. I go to put him down and literally 5 to 10 mins later he is rooting again and hungry. I make sure he is changed and dry as well to make sure thats not making him wake up.

He is 1 week 2 days old

Any advice? I need help.