Girls, hello everyone, I'm panicking very badly, my son got sick, he h…

Girls, hello everyone, I'm panicking very badly, my son got sick, he has phlegm cough, they prescribed ceftriaxone injections, but whistling breathing doesn't go away, home remedies say it's from mucus, do you think we should run to the doctor or finish the injections and then panic? According to the X-ray, everything was clean, the analyzes were good (they put a virus on the background of teeth).