Hi icylemon,
pardon me...a bit kai po, but really wish to help.
My girl was down with fever just the week b4 her birthday. It's best to bring to PD for a check, may be virus or bacteria. If virus, with the prescription given, the fever should subside quick fast.
That time, my girl's temperature still fails to subside, still up and down after 3 days, even up to 39.2. PD suspect bacteria, so have to take antibiotics, which she did, and recovered after 2 dose.