Sudden Milk Rejection

I'm not sure why but my LO currently at 11 weeks old suddenly rejects milk. It's the longest time so far at 6 hours of her without a feeding. She had sufficient milk intake today at 730ml but at 8.15pm. Decided to give her a some milk before bedtime at 10.30pm which she rejected too (usually she will cry for milk for every 2 hours unless bedtime which she will drag 4 hours). Then at 1am, wanted to dream feed her before we go to sleep, she only drank 30ml (that's 5 hours stretched alr). She's super duper sleepy since 9pm after bathtime and KO after that. Should I try to dream feed at 3am later on? Took her temperature this afternoon and its 37.2 degrees. Before bedtime at 1am its 36.2 degrees but still, she doesn't want any milk ?