@Sally Sunshine Aw that sounds like what happened to my son a few weeks ago. Had to take him to urgent care and he had pneumonia
...You can put an ear to her back and listen for crackling sounds in the chest and you'll hear it if she's got it. There were several kids who ended up getting it in my boy's classroom. It got to the point where the school district nurse called me to find out what kind of symptoms he had so they could send a letter out to parents. It's best to get her checked right away if you have any doubts

sounds like you're headed in that direction. Fingers crossed for your daughter
Edited to correct tag. Grr.