DS started dry coughing a couple of days ago, now he is coughing a lot and it sounds wetter and chestier. It's very frequent. He does not have a temp and seems fine otherwise. He wants to go to school. He is coughing a lot though every few mins or 10 mins or so. I'm worried it will harm him but of course also that he may pass something on. But he seems so perky and normal other than the cough it also seems a shame to keep him at home. What should I do? I'm new at this