Re: pumping for 1 week now
It's very normal to have differences in supply between breasts. Human beings aren't perfectly symmetrical, after all! It's a little odd that you get more milk from the left, considering that you have pain and must use a shield on that side; pain often indicates a latch problem, and a latch problem and shield use can both decrease stimulation to the breast and consequently lead to reduced milk supply.
Are you trying to build a stash for a return to work, or are you just going to be leaving the occasional bottle for a sitter? Your pumping output is pretty normal, since you're starting slow and pumping after a feeding instead of in place of a feeding. If you were pumping instead of nursing, you'd likely get a lot more milk.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"