flu or covid

my 7yr old girl came home yesterday with a headache says it hurts everywhere light sensitive, sound sensitive and throbbing vomited in the car before she got home. i thought it was a migraine and since i couldn't get much info from her i gave her hylands migraine then she kept throwing up gave the medicine twice didn't help so i thought it might be the flu or the c word. then i gave flu medicine by boiron. she fell asleep for a few then woke up vomiting again. then was able to sleep through the night. woke up said she felt a little better still has a headache then she started throwing up again. i gave another dose of the flu medicine but she keeps vomiting had a few hours break ate 2 popsicles felt better but now vomiting again. her head is warm cheeks are cold. a little restless and irritable, laying in bed covered up at times then throws off the blanket says she hot but the blanket make her feel better and she likes a cold rag on her head. vomit is bile and forceful with retching and a lot of belching before she vomits. also sounds like she's gasping with the belching. her face turn red, eyes bloodshot, and watering when she vomits. stomach hurts due to the retching. vomiting makes her feel better for a short while then she gets nauseated again. i aslo noticed that motion makes her vomit but she still vomits lying still. lots of belching when feels nauseated. i do not have ipecac. any suggestions. i have tried arsenicum album 200 and bryonia 200