K.G.
I quite literally feel your pain! lol. I just went through this with my daughter last month. She bit me so hard I couldn't nurse her for 3 days and I had to walk around with an ice back in my bra! She still bites down a little every great once in a while when she's sleepy but never like she used to. Here are a few tips I picked up from La Leche League and some experienced moms...
-if he bites you, immediately take him off your breast and walk (or turn) away for a few minutes. He'll start to recognise that biting cuts off the milk supply.
-if he bites down and doesn't immediately let go, pinch his nose. He'll let go to catch a breathe and because he'll probably find it irritating. He'll figure out that biting you equals discomfort, and will stop.
In the meantime, for your pain I suggest Lansinoah for your nipples and ice packs. Also try expressing some milk on the area to help you heal, and if possible pump only on the injured side until healed.
Good luck!!!