2 year old ds had a high fever for three days last week and then it went away - he felt ill and floppy but no other symptoms. Had him checked out by doc, who though it was a virus. then last night his temperature just shot up out of the blue - again no other symptoms, but very floppy and cranky - given him calpol and now its down to 37.6 and he's fallen asleep but terrified of it shooting up again. Anyone else,s children had anything like this recently? Mystery viruses with high fevers going round? Bit worried.