Really sorry to hear this Khris. I got the flu starting on August 19th...and then a subsequent throat infection. Got that all cleared up with some antibiotics...but then my husband got the throat infection a week later and was put on antibiotics himself. Then, I got it back again! (also another week later - so I'm saying I got the throat infection back two weeks after I got it cleared up the first time - ridiculous). I've been sick for the past four days, hence my not posting around here. Three days into the second round of antibiotics and I'm starting to feel better again.
Anyway - just wanted to suggest keeping a sharp eye on things when your daughter gets better from the flu part. I got better, and then got worse - which was an indicator of a subsequent bacterial infection.
This was my first flu ever - and apparently the flu can sometimes mean bacterial infections afterwards. The flu apparently does something that breaks down your normal defenses to bacterial stuff.
Meanwhile, when I went to the doctor on day six of my flu (feeling much, much worse) I wasn't even aware that I had a fever. I'd check it occasionally, and didn't see a fever. Well, at the doctor's I did have a fever - so I think that the fever can come and go - it's sort of an intermittent thing. I also didn't know that you could get a fever a couple of weeks afterwards, out of the blue - so keep checking for a few weeks afterwards, just in case.
Anyway - in terms of any advice - all I can suggest is that you won't feel like cooking much, so when you do - cook up a lot of food at once, so you have stuff on hand that's easy-peasy. If you're going to make something, make lots. Then you won't have to again for a little while. Advil was a great help for me, in terms of managing the body aches and stuff. Plus, I had no idea that Advil would help a sore throat, but it does - much better than any throat lozenge or cough syrup.
Also - a mug of Earl Grey would always make me feel better, and so did plain ordinary canned soup.
Hang in there - and please get better soon! Sorry to hear about the ER thing, that must have been scary.