Fever out of nowhere

kg_08

Yesterday around 1 I thought DD felt warm. By 2 she felt really warm so I took her temp under arm, and it was over 101 so I gave her some medicine. As the day progressed she seemed more and more uncomfortable. I was able to get about 20 oz of liquids in her fortunately, but her appetite was terrible and she slept most of the day. At one point her fever got just over 103 rectal, but medicine brought it down to 101.4 which the nurse said was reasonable.

I checked on her a couple times during the night, then at 5:00 a.m I went to feel her and her fever is totally gone. Is it actually over that quickly in like 16 hours? Should I expect more to come, or since her fever is gone without medicine now should she be ok? This was actually her first real fever in 11 months so I'm not sure about these things.