I used to panic. Every little fever was suspect. Until, the time, a couple months shy, of my oldest sons 2nd birthday, he had a fever, and was lethargic, wasn't quite lifeless, but just lacked any desire to move around. I took him, to the pediatrician. He was sent, to the ER. His O2 levels were below 80. He had, RSV. Because, he was under the age of 2, he was admitted into the hospital, week of XMAS. I spent the week with him, hooked up to IV's, pale as a ghost, and just quite not what you want to see from a toddler.
He was released on the Eve.
From that point on, I know how to detect troublesome fevers and not so troublesome fevers. To be honest, at this point, I rarely use a thermometer in my home. Their behaviors are more an indicator to me, than just using a thermometer. Sometimes, those devices, aren't always in proper working condition, nor calibrated properly.
Of course, monitor their temps. Of course, if it's not going down, and there's more symptoms to boot...get them to the doctors office. My Pedi's office, has 24 hour service. I can call, speak with someone, and then be advised, for morning walk in hours, or directives to the ER, where my pedi is the head pediatric doctor, there.
Hope your child, starts to feel better. All these, stories, you read, hear about watch on the news....ask your pediatrician, what's truth, what's elaborated for news media, and what is the best signs to look out for, as far as getting your children the help that they need, when they need it the most.