HELP! 12-week-old baby refusing breast

Charlene

My baby suddenly started to refuse my breast, arching her back and crying when put to my breast to feed. She does take the bottle though...sometimes she does arch her back when bottle feeding without stopping to feed from the bottle, but it's impossible to make her take my breast recently...It's been 2 days and I have tried a few times in the middle of the day, before bedtime, right after wakeup...even after bottle feeding a little to take off the edge of hunger...She just won't take my breast...:( my breastmilk does have a fast flow it seems...could that be an issue?)

She had been feeding well on both mybvreast and the bottle almost since week 1 before she went on this boob strike... (I had to supplement with formula for a bit in the beginning.)