We have battled acute asthma with my now 18 year old dd for almost 13 years and 10 of them really bad.
She was a cougher not a wheezer and she would throw up from coughing so badly. Her airways were usually very diminished once she hit this point and if she was scared and could'nt breath we were in trouble.
Did you specialist tell you that at 17 months many allergies will NOT even show up. I had allergy shots done at 2 and again at 5 and the overall grass allergies and fall tree allergeis did not show until she was 5.
Next time please get an assessment of how the lungs are performing at an ER. When my daughter has gotten to the point of being scared she had totally good reason to be scared and ended up in the Hospital for days.
Just as an FYI, while an inhaler can appear to work with more success, it is the nebulizer that distributes the meds 4 times as fast to the restricted airways. It is the same dose of medication but the combined air and moisture from the compressor get it into the lungs much faster. Much of the meds in an inhaler can be lost in the administration.
Good luck