Rose,
Congratulations on breastfeeding your baby! It's the singular best thing you can do for her, and it doesn't have to stop at 6 months.
If you are still breastfeeding, your size may actually go down as you get further along in months. I increased from B to D, and am back to B again. A friend went from DDD to I, and she reduced back to DDD again. Her second pregnancy was not so tough, though I am not privy to letters this time around.
A reduction generally means no breastfeeding later on. A friend's daughter had the same and she was unable to breastfeed.
Wait until your next baby, or until you are sure you are absolutely sure you will have no more, if you want that bond with the next baby. It's so much more than a bond though! Between nutrition and immunity, your baby receives so much! My son STILL has no colds, no sniffles. THAT is a sanity saver in and of itself.
Good luck!
M.