1yo doesn't want milk

usually, my daughter consumed pediasure and cowhead milk. 2 - 3 times pediasure and the rest she will be drinking cowhead milk but after she came back from injection, she had a fever for 4 days and start from there she doesn't finish her milk like she used to. it's been 2 weeks already. im so worried 😞 she also doesn't eat. how? whenever i forced her to drink her milk... she will vomit it out. i tried changing flavour for pediasure cause usually she will drink the original flavour... tried chocolate, strawberry etc but she still declined. and she's been throwing tantrum too. sometimes i can't control her cause im currently waiting for my due date... having on and off contractions, pelvic pain. my daughter needs to be carried all the time and i always carry her cause if not she will yell.