Wil asthma

Just when we think his asthma is under control...he has a bad attack. This morning he had the full out, I can't breath, wheezing and cough and then puking kind of attack. He has had a treatment and is doing much better. Poor baby is laying on the couch, he told me,"it's a good thing my nose is not stuffy this morning or else i would not be able to breath, I can't breath out of my mouth without it hurting." I am assuming it is just viral or allergies. Thought it might be the flu this morning when he was puking and miserable, but so far just typical asthma attack kind of day. I am hoping he avoids the flu as I know we will have the asthma junk to go along with it! Keeping my fingers crossed that he continues to improve throughout the day!