My son had RSV from 3-4 months and now just had a bad enough respiratory cold to put him back on the steroids and neb at 11 months for 1 week. Before he was diagnosed with RSV another Dr. (at a walk in clinc, he perscribed him Zyrtec for environmental allergies. I didn't give it to him because I knew he was wheezing in his lungs and knew it was more.) In between these 2 bouts I feel like I'm always having to give him triamenic yellow to help with his decongestion, but it never works. I understand teething can cause some of the irritation in his sinuses but he has other respiratory symtoms... When he gets really active he huffs and puffs and starts to wheeze and he gets a runny nose often. He doesn't cough too much but if I don't give him anything, thinking it just teething, he seems to get worse and then he's back on meds. His eyes seem to get red rings around them and just look irritated. The ped.'s nurse practitioner that I go to mentioned he could have further respiratory problems developing such as asthma or he could just grow out of all this. I'm concerned because both my brother and I had various respiratory concerns as babies and were both in oxygen tents at one point and have had to use nebulizers all our lives when we get sick. I myself kept passing out during athletic practice or high intensity workouts and was told it might be asthma, however after 10 years was diagnosed with multiple heart valve regurgitations. 

Should I be concerned that he may have future allergy complications or can he be developing allergies? What can I do to help determine that cause of his frequent wheezing and shortness of breath? What are signs of asthma I should look for, just in case?

THanks!