Hi, and welcome to the site.
I have a couple questions...
When he wakes at night and it isn't time to feed, does he go right to sleep with the pacifier?
Can you tell me how may oz per day he is drinking, including night feeds?
How many total hours of sleep does he get in a day?
When, time wise, is his last nap? /How much time passes between the last nap and bedtime?
Does he fall asleep without a prop, ie, bouncing, bottle, rocking, at night and naps?
I don't think you need to worry about having "rich" milk, however I would be sure to pump your breasts until they are empty as the hind milk is the fatty milk. If you would like, I can send a breast feeding mod over or you can post that question in the bf forum.
Post back and I will try to give you more advise and less questions.
Myia