You might get a couple of weeks of really big boobies, as your milk comes in, but that usually settles quickly to your pregnant boobie size.
As you get further in to your feeding.. 4-6 months.. they'll settle to a size that will prob last till weaning...
So you shouldnt get *too* much more growth, just the in-coming of your first milk!!

Spare a thought for those of us that started at 14DD before falling pregnant!!!