Self weaning or just a nursing strike?

Ol

My 10.5 month daughter has started to refuse to nurse throughout the day. I've been pumping and giving bottles while with her and she gets bottles while at daycare. Since she has drastically cut back nursing my supply has plummeted. I just dont respond as well to pumping. She will only nurse when she wakes at night which has been averaging 2x a night sometimes 3. I think she's waking so much because she's not getting enough milk during the day. Today I tried giving some formula, and she wouldn't drink it. Not sure what I should do. Anyone else go through something similar? I do have just a small freezer stash that won't last us long if my supply doesn't come up.