Here's the PM I just sent the poster above, in case anyone else is searching the forum for help with this issue:
So, as far as the incision site, three things:
(1) Pressure bandages on the incision. You may need your husband's or a friend's help. Take a piece of gauze and fold it until it is a small hard lump. PUSH the gauze lump onto the incision site. THEN, quick, spread a sticky bandage on top, holding the gauze down. If you don't let up the pressure on the gauze while you do this, the bandage should press the gauze into your breast, putting some pressure on the wound. This will encourage the milk to flow OUT of your nipples rather than out the wound - path of least resistance.
(2) Similar, you can nurse or pump on the wounded side, but as you do so, APPLY PRESSURE to the incision site by pressing on the bandage right there. Again, you want the milk to come out the nipples, rather than leaking. Applying pressure makes it less likely to leak.
(3) You will probably need to decrease the amount of pumping and nursing you are doing on that side, to lower your supply (just on that side) so that the wound will heal better. Depending on your supply, you may only need to reduce it a little, or a lot. I "partially weaned" off the side with the incision by nursing more and more on the other side, and less and less on the hurt side. When I say "partially weaned," I still pumped or nursed on the hurt side two or three times in a 24 hour period, but no longer every other feeding.
When the incision site stopped leaking (which took about two weeks of doing the above), I let it heal for a while and then starting nursing on that side more and more, until my supply evened out again. That took a while, and my left breast (the non-biopsied one) STILL makes a little more, but that's fine. Now I nurse on both sides, and everything is long since healed, the lump is gone, and you can hardly even see the scar where the biopsy was!
So it takes some patience, but I honestly think that doing this was easier for me than weaning, which would have been physically hard but also emotionally devastating.
If you have to supplement, can you try a finger feeder or cup? Some babies that reject the bottle will drink from a small cup, unbelievably. It might be nice to have a backup option, because as you wean off the one side a bit, your supply will naturally go down. The key is to lower it a little, enough so that the wound stops leaking and heals, but not so much that you can't easily increase it again. Contrary to what many women think, your supply is very flexible - you can reduce it, and then increase it again, if you are careful and know what you're doing.
I was very lucky to have the help of a local lactation consultant through all of this, but she really just explained the steps above, told me my doctor was full of crap, and then I did the rest!