Desperate for your help: Nursing Strike?

Hello Nursing Mothers,
I need your wisdom! I haven't posted a LONG time, but this is a situation only to be handled with the wisdom of you women.

My dd is 13 months today. She is my 3rd baby. She was an avid nurser, solids made up 10% of her daily intake. She sleeps right next to me, and nurses 3-5xs a night (well, it could be 10xs really, coudn't it? I usually sleep through most of them.)

Here is my situation mixed with some questions:
(preface: my milk supply decreases a few days before my period starts)
So my period was late the supply decrease was significant and spaced over 3-4 days. She was frustrated, but we've gone through this before. Once the flow starts with my period, my milk is back full force. (Does anyone else experience this?) My period started last night. This is my 3rd babe, and the first two had no problem if there was in fact a change in the taste of the milk. And my baby now has not shown a problem with it in the past, if there is an altered taste.

Yesterday, starting about 4pm, she bites me and refuses to nurse. Every time I put her to the breast, she would bite me. (ooh those razor baby teeth!) She wouldn't even latch on. I FINALLY got her to nurse an hour after she fell asleep, and then a few times during the night. No biting when she nurses while asleep, whew!
Her gums are not swollen, there appears to be no teeth coming. Not to say that couldn't be the case.

It is now 4pm the next day. She has not nursed all day! I pumped, she won't take it from a sippy cup.
She has gone from nursing 10+ times a day to NOTHING! I refuse to believe she is weaning herself, she is such a little baby.

Please tell me this is a strike and help me navigate through it. I'm begging you.

Thanks so much,
Quincy