Hi A. :)
I think you'd be sorry if you stopped feeding on your left side. Your left would still produce milk and be effected by let-down (opening yourself up for clogged milk ducts and infection) and your right breast would start producing even MORE milk, potentially causing problems on both sides. :(
I used to have the exact same problem you speak of but switched. I called my left breast my "mega-milk" breast and my right "desert-breast". My left always seemed to be huge and full of milk and my right never to have enough in compairison.
What I discovered tho, was that pumping was a bad way to tell how much milk my baby was ACTUALLY getting out. Her mouth is designed to get the milk out and does a "professional" job of it, whereas the pump is only a substitute of the real thing and just doesn't have the ability to get the maximum amount of milk out.
A better way to tell is to listen to your baby swallowing on your left side and his hearty burp afterward. ;)
I would just keep nusing away on both sides and think of your right breast as "the main course" and your left as "desert". Don't skip feedings on it or anything, just keep going back and forth. :) Your little guy will get PLENTY of milk, I promise. ;)
If you do still feel that you arn't producing enough, I would highly recommend eating a lot of oats. There's just something about oats that ups milk supply like you wouldn't believe! Try eating two big bowls of cheerios a day and watch what happens! hehe :)
Best of Wishes!
M.