She might just be having a tired/cranky day? *hugs* to you, I know how horrid breast refusal feels.
FWIW, I would think she will be back to normal soon enough. If you possibly can, try to just stay relaxed. If she wants to drink she knows where to get it from.
Some of the suggestions I've been given in the past are:
- have a bath together
- lie down together with your top off. Just play/talk a bit and casually offer the breast (like you don't care either way, LOL!)
- get her while she's drowsy (wake her if you're comfy. I never was comfortable doing this, so can't say it has worked for me personally.)
Hopefully this has just been an off day for her and you'll be back to normal tomorrow. All the best.