Girls, hello. Help me with advice. My husband got sick, and I caught t…

Girls, hello. Help me with advice. My husband got sick, and I caught the virus from him. We easily recovered. On Monday evening, the temperature was 37.5, it rose in my son on Tuesday. The doctor came, said to drip Gripefen for 5 days and drink chamomile tea. The temperature went up every evening, but in the morning normalized. But now it jumped to 38.5. I put a candle Cyfecon and put him to sleep. Do you have questions is this normal course of ORVI? At what point should I start worrying? I'm used to everything passing in one or two days. And here it's not like that...