Im asthmatic but developed a barking deep cough 4 weeks ago. relived by ventolin and benadryl. is the cough triggered by my asthma or something else?

Trigger ???: This is likely an interplay between your asthma, which is a constant but hopefully controlled,an an external trigger. Some exposure or infectious process is likely the "trigger".Sorting that out may require you keep track of when, what, where all this started and what additional symptoms you have had during the process.Take the list to you doc and see if additional treatment/s are needed.