breastfeeding problems! help!

I have been nursing my baby from the beginning. We have had our share of ups and downs but overall, it's been great. She's now 9 months old and is now randomly boycotting it. She screams, pulls away and down right refuses. It's completely stressing me out! I try offering her my breast often but she either bites it or just doesn't even bother. What do I do?! She's too young to be weaning herself and she hates formula!! 😩😩