I have a four month old dd who isgaining weight normally and such, so I'm not worried about my supply so much. I have noticed that my right breast is larger than my left, however it seems to make less milk and it all seems to be hindmilk. My left breast seems to make more milk and it is mainly foremilk. When I pump I pump mostly foremilk. I also get about an ounce out of the left breast and only a 1/4 of an ounce out of the right one. I don't know what is going on. Also my right breast is more prone to clogged ducts and had mastitis once (found a way to ward them off though, lecithin.). My dd also seems to prefer my left breast.