Give steam inhalation, warm water to drink with honey, soup,  avoid milk and milk products, add haldi in food.

My request is never use combination of drugs. Since you have treated for one week, I think no need to give further antibiotics. Try indian Kadda. Take 150 ml of water , add a small piece of crushed ginger, 3-4 peices ofcloves, jaggery, ellachi big variety a few seeds boil the concotion, to reduce water roughly to 100ml.cool slightly and feed the baby. You can add Tulsi. Indian herbs are now world all over and are found very effective.I am very sure it will work give 2_3 times till babby canñ. For your information it works even for adults.