biting 10 month old #help!

Racheal
I have been breastfeeding my baby from birth - current.  She just recently started biting me again! She drew blood this time around and then bit the other side after. I yanked her off and handed her to her dad as I'm now in tears myself!  I'm starting to rethink my goal of making the whole 12 months :-(  so my question is:
What do I do now?
I need advice, and steps and success stories! Just a side note, when I pump, my milk seems to decrease...I don't know why, but it does.Like my breasts get to a point where they just stop producing as much My milk supply has always been a struggle so feeding on demand was a must and she's literally stuck to me all the time...even at 10 months. That's why I'm so proud that I've made it this far! . Help me out ladies, I would appreciate it so much!