My baby is 5 months old. She started daycare 2 weeks ago and she got her first cold already. She coughs a little during the day and you can hear that she has mucus in her airways. I'm using saline drops, nosefrida for sucking the snot and letting her sleep with a humidifier. What else should I do? Do I have to call the pediatrician? She sleeps and eats fine and has no fever