Newborn with a cold?

Nunu Mother Of 2

My baby is only 16 days old and her big brother (from her dad's side) came in with a cold this weekend and got the whole house sick! Now my sweet baby's breathing is labored and I can hear so much mucus in her chest 😢I've been sitting it a steamy, closed bathroom for 20 mins a few times a day which seems to help while we're in there but is there any medicine or treatment I can give a baby this young?