Suggest Remedies For Raspy Breathing In A Child After Medication For Cough

My son was 3 months on sunday, he started with a cough on friday and we took him to the doctors monday. They said he had an ear infection in both ears. They put him on some new medicine and he has now a raspy breathing and just keep his mouth open & of course that is making him droll a little more than from just the teething. Should I take him in again tomorrow? He just got off amoxicillin last Tuesday and was on it for 10 days because they said he had a little ear infection on a saturday and his docotor said no sign of it that following tuesday. They told us if he has another ear infection they are going to send us to a nose and ear specialist. I have him sleeping in a travel swing so he is upright some, I use saline in his nose & do the suction. I also put baby vicks on his back, chest and feet. We have a humidifier and are not running the heater because they said that would make it worse. Nothing seems to be working and I am tired of seeing my son sick. And I am tired of feeling his breathing of whatever is in his chest while i am holding him. What do I do?