Amy, breast refusal is so awful. It could well be a temporary thing. I agree with AJP, it's important not to force the issue. Make sure you express if she's not feeding much, or at all. Try feeding her in the bath, or snuggling down in bed. Or try feeding her when she hasn't woken up properly, I find that often works for us, he is instinctively sucking before he knows what he's doing LOL.

Hopefully Barb is around with some ideas. Or Christy, she (unfortunately) is all too experienced with breast refusal. Good luck hun