My 10 month old has had a bad cough very randomly on and off for a month. We went to the doctor 2 days ago. They said nothing we can do for his threat besides Tylenol but they didn't hear any coughing so they weren't worried. And sent us home. Today he seems worse than Tuesday, should I make another appointment or just do what I've been doing and wait it out. His cough sounds phlegmy and he is starting to breath with a tiny wheeze but he's still acting normal