I know EXACTLY how you feel! My boobs are probably about the same sizes as yours and it happened to me with all my babies around 6 months (i think I have 'shorter' ducts on one side so its harder to feed and they all get a little more knowledgeable/fussy by 5-6months. So now I figure its not worth the struggle trying to continue with both and the 'big' one just takes over all feeds... So having said that I have a molded padding that I use in the small side from then so hopefully I won't get to sagged from being in a bra that's way to big (for that one ) and I'm alot more comfortable. Occasionally I have to readjust that side but its not to bad especially when you consider I'm running around after 4 little ones. Anyway, you can get them from a bra shop (and I think maybe Kmart target??) I've found it helpful hope you work something out to