Hello. Moms, who can tell me what to do. The child is one year and two…

Hello. Moms, who can tell me what to do. The child is one year and two months old, has ORVI (caught from husband). For three days there was high temperature, on the second day it reached 39.6. I lowered it if it rose above 38.5, I rehydrated him so he wouldn't dehydrate. As a result, after three days the temperature dropped significantly (not after an antipyretic, but by itself), and the child was 35.5 all day, and when he slept, I thought he was completely cold. Now 34.6! I don't know what to do, I try to hug him and warm him up, but